Palladium,dichlorobis(triphenylphosphine) is a kind of yellow crystals with Molecular Formula: C36H30Cl2P2Pd and Molecular Weight: 701.91. It is a coordination compound of palladium containing two triphenylphosphine and two chloride ligands. It is often used for palladium-catalyzed coupling reactions, prepared by reacting palladium(II) chloride with triphenylphosphine.
Palladium,dichlorobis(triphenylphosphine) is insoluble in water with the other properties: Density:g/cm3; Boiling Point:360 C at 760 mmHg; Melting Point:260C; Flash Point:181.7 C; CAS Registry Number:13965-03-2. Palladium,dichlorobis(triphenylphosphine) is stable at room temperature in closed containers under normal storage and handling conditions.When you store it, you should minder these: Store in a tightly closed container. Store in a cool, dry, well-ventilated area away from incompatible substances. Store protected from moisture.
If you need buy some Palladium,dichlorobis(triphenylphosphine), this article will be very useful for you. These supply information all refer to Guidechem. Guidechem chemical B2B network provides information on china and global chemical market quotation and relative chemical Information.Guidechem Chemical Network providing the most complete information of the chemical industry.
1.Capot Chemical Co., Ltd.
Updatetime:Feb 27 2014
Purity:98% Min. Order:1/Kilogram Supply Ability:up to kgs Month/Kilogram
DetailDesc:701.90,C36H30Cl2P2Pd
Tel:86-571-85586718
Address:Joinhands Science Park, No.4028,Nanhuan Road
2.AOPHARM
Updatetime:Feb 27 2014
Purity:99%
DetailDesc:yellow solid
Tel:86-311-66600578
Address:C-2103 Wonder Business Square, 15 Yuhua West Rd.
3.Hangzhou Dayangchem Co., Ltd.
Updatetime:Feb 27 2014
DetailDesc:Dichloro-bis-(triphenylphosphine) palladium(II)
Tel:86-571-88938639
Address:B/2601 Fuli Building, 328# WenEr Rd. Hangzhou City 310012 China
4.Atomax Chemicals Co.,Ltd
Updatetime:Feb 26 2014
Purity:95%min Min. Order:mg/g/Gram Supply Ability:g/kg Month/Kilogram
DetailDesc:We are a leading global supplier and manufacturer of chiral chemicals, amino acids, aromatic and pyridine halogens, natural extracts and pharmaceutical raw materials. Those chemicals are widely used in the pharmaceutical and fine chemical industries and in research laboratories.
Tel:86-755-33239182
Address:Huiji302 Hutingju Sanwei Xixiang SHENZHEN 518126, China
5.run-biotech Co., Ltd.
Updatetime:Feb 24 2014
DetailDesc:Bis(triphenylphosphine)palladium(II) dichloride
Tel:86-21-61900721
Address:Room 3-201, No.787, Kangqiao Road, Pudong New District, Shanghai, China
6.Hui Chem Company Limited
Updatetime:Feb 27 2014
Purity:98% Min. Order:1/Gram Supply Ability:10 Month/Kilogram
DetailDesc:We could receive custom synthesis according to your requirements from lab scale to commercial scale
Tel:86-21-60542966
Address:Lane 299 Bisheng Rd,Pudong District
7.Nanjing Chemlin Chemical Co., Ltd.
Palladium,dichlorobis(triphenylphosphine)(CAS NO:13965-03-2)
Updatetime:Jan 24 2014
Purity:97.00%
DetailDesc:intermediates, drug discovery
Tel:86-25-83697070
Address:Rm.902 Longyin Plaza, No. 217 Zhongshan Rd.(N) Nanjing 210009,China
8.Rosewell Industry Co., Ltd
Palladium,dichlorobis(triphenylphosphine)
Updatetime:Jan 09 2014
DetailDesc: We are the leading supplier of APIs,inhibitors, animo-acids,peptide, other pharmaceutical intermediates, and custom synthesis products.
Tel:86-519-86202821
Address:Qixing building, Mingxin road, Changzhou,Jiangsu,China
9.Angene International Limited
Palladium,dichlorobis(triphenylphosphine)
Updatetime:Jan 08 2014
DetailDesc:You can find Bis(triphenylphosphine)palladium(II) chloride with most competitive price and high quality here. Welcome to inquire for stock confirming.
Tel:852-852-81916999
Address:4/F Silvercord Center Tower 1, 30 Canton Rd,KL,Hong Kong
Guidechem provide the most convenient conditions for the international buyers and let these leads benefit all the business people. If you need Palladium,dichlorobis(triphenylphosphine) or any other chemicals you can access to our Guidechem.
2014年2月27日星期四
Dess-Martin periodinane is used in many fields
Dess-Martin Periodinane, a hypervalent iodine compound, offers selective and very mild oxidation of alcohols to aldehydes or ketones. The oxidation is performed in dichloromethane or chloroform at room temperature, and is usually complete within 0.5 - 2 hours. It has the Synonyms: 1,2-Benziodoxol-3(1H)-one, 1,1,1-tris(acetyloxy)-1,1-dihydro-, and it is mostly known as DMP. It is a kind of white crystalline powder with Molecular Formula: C13H13IO8 and Molecular Weight: 424.14, the CAS Registry Number is 87413-09-0.
Dess-Martin periodinane is commercially available and decomposes only slowly. But Dess-Martin periodinane is heat and shock-sensitive, and shows an exotherm when heated >130 C. 2-Iodoxybenzoic acid (IBX), the impact-sensitive intermediate in the synthesis of the Dess-Martin periodinane, is available in a DMSO solution and is also used as an oxidizing agent.
Partial hydrolysis of Dess-Martin periodinane or incomplete acetylation gives a more effective oxidant, explaining why impure samples of this compound in many cases provide better results than the pure reagent. When reliable and convenient rate enhancement is desired, pure Dess-Martin periodinane may be decomposed with an equivalent of water immediately before or during its use.
Dess-Martin periodinane is mainly used as an oxidant for complex, sensitive and multifunctional alcohols. One of the reasons for its effectiveness is its high selectivity towards complexation of the hydroxylic group, which allows alcohols to rapidly perform ligand exchange; the first step in the oxidation reaction.
Proton NMR has indicated that using one equivalent of alcohol forms the intermediate diacetoxyalkoxyperiodinane. The acetate then acts as a base to deprotonate the α-H from the alcohol to afford the carbonyl compound, iodinane, and acetic acid.When a diol or more than one equivalent of alcohol is used, acetoxydialkoxyperiodinane is formed instead. Due to the labile nature of this particular periodinane, oxidation occurs much faster.
Using the standard Dess-Martin periodinane conditions, alcohols can be oxidized to aldehydes/ketones without affecting furan rings, sulfides, vinyl ethers, and secondary amides. Allylic alcohols are easily oxidized using this chemical, which are typically difficult to convert to their respective carbonyls using the typical oxidants.
Difluoro and monofluoro alcohols are more difficult to oxidize. Swern oxidation has been used, but a large excess of the oxidant had to be employed, and in some cases did not give reproducible results. Linderman and Graves found Dess-Martin periodinane(CAS NO: 87413-09-0) was partially successful, but side reactions occurred. Using the modified DM oxidant shown below, produced the wanted carbonyl in high yields. The reason Linderman and Graves chose tert-butyl alcohol as a ligand instead of acetate was due to its bulk and nonoxidizable characteristics. This was to minimize the unwanted byproduct acetic acid formed.
Learning more information about Dess-Martin periodinane, please access to guidechem. Guidechem Chemical Network providing the most complete information of the chemical industry.
Dess-Martin periodinane is commercially available and decomposes only slowly. But Dess-Martin periodinane is heat and shock-sensitive, and shows an exotherm when heated >130 C. 2-Iodoxybenzoic acid (IBX), the impact-sensitive intermediate in the synthesis of the Dess-Martin periodinane, is available in a DMSO solution and is also used as an oxidizing agent.
Partial hydrolysis of Dess-Martin periodinane or incomplete acetylation gives a more effective oxidant, explaining why impure samples of this compound in many cases provide better results than the pure reagent. When reliable and convenient rate enhancement is desired, pure Dess-Martin periodinane may be decomposed with an equivalent of water immediately before or during its use.
Dess-Martin periodinane is mainly used as an oxidant for complex, sensitive and multifunctional alcohols. One of the reasons for its effectiveness is its high selectivity towards complexation of the hydroxylic group, which allows alcohols to rapidly perform ligand exchange; the first step in the oxidation reaction.
Proton NMR has indicated that using one equivalent of alcohol forms the intermediate diacetoxyalkoxyperiodinane. The acetate then acts as a base to deprotonate the α-H from the alcohol to afford the carbonyl compound, iodinane, and acetic acid.When a diol or more than one equivalent of alcohol is used, acetoxydialkoxyperiodinane is formed instead. Due to the labile nature of this particular periodinane, oxidation occurs much faster.
Using the standard Dess-Martin periodinane conditions, alcohols can be oxidized to aldehydes/ketones without affecting furan rings, sulfides, vinyl ethers, and secondary amides. Allylic alcohols are easily oxidized using this chemical, which are typically difficult to convert to their respective carbonyls using the typical oxidants.
Difluoro and monofluoro alcohols are more difficult to oxidize. Swern oxidation has been used, but a large excess of the oxidant had to be employed, and in some cases did not give reproducible results. Linderman and Graves found Dess-Martin periodinane(CAS NO: 87413-09-0) was partially successful, but side reactions occurred. Using the modified DM oxidant shown below, produced the wanted carbonyl in high yields. The reason Linderman and Graves chose tert-butyl alcohol as a ligand instead of acetate was due to its bulk and nonoxidizable characteristics. This was to minimize the unwanted byproduct acetic acid formed.
Learning more information about Dess-Martin periodinane, please access to guidechem. Guidechem Chemical Network providing the most complete information of the chemical industry.
2014年2月26日星期三
The main usages of Tetrabromobisphenol A
Tetrabromobisphenol A has the largest market among brominated flame retardants. It is a white to off-white powder melting point of 180-184 C; soluble in methanol and ether. It is produced by the bromination of bisphenol A with various solvents such as halocarbon alone, hydrobromic acid, aqueous alkyl monoethers, acetic acid or methanol.
Tetrabromobisphenol A(CAS NO:79-94-7) is a derivative of bisphenol A and is synthesized from this substance. Most commercial Tetrabromobisphenol A products are of a relatively low purity, in fact containing a mixture of products brominated to varying extents. This is not generally considered to be a drawback, since in most applications of this substance (i.e. flame-retarding) it is the average %Br that is of importance. The mixture resulting from the bromination of bisphenol A is therefore not purified, allowing a more efficient, lower cost product.
Tetrabromobisphenol A can be used as reactive and additive flame retardant. In the reactive application, it is bound chemically to the polymers. The main use are epoxy resins of printed circuit boards. As an additive flame retardant it is used in acrylonitrile butadiene styrene.
Tetrabromobisphenol A is used as a reactive flame retardant in epoxy, vinyl esters and polycarbonate resins. The main application of Tetrabromobisphenol A in epoxy resins is in PCB where the bromine content may be 20% by weight. It is used also as a flame retardant in polymers such as ABS, polystyrenes, phenolic resins, adhesives, paper, and textiles and others. It can be combined with a synergist such as antimony trioxide for maximum flame retardant performance. Tetrabromobisphenol A may also be used as a parent compound for the production of other commercial flame retardants.
Tetrabromobisphenol A is the largest volume brominated flame retardant in production today to improve fire safety of mainly electrical and electronic equipment. The main application of this chemical is as a reactive flame retardant in laminates for an estimated 90+% of printed wiring boards. It is also used as an additive flame retardant in ABS plastics. It is chemically bound in these applications and has no potential for emissions to the environment Among all the different flame retardants that can be used in printed wiring boards, Tetrabromobisphenol A is the most well researched flame retardant.
According to both the WHO and the currently undertaken EU Risk Assessments, Tetrabromobisphenol A(CAS NO:79-94-7) has little potential for bioaccumulation and presents no significant health effects of concern. Also, No emissions from circuit boards could be detected Tetrabromobisphenol A is currently being risk-assessed at the EU-level.
Learning more information about Tetrabromobisphenol A, please access to guidechem.Guidechem Chemical Network providing the most complete information of the chemical industry.
Tetrabromobisphenol A(CAS NO:79-94-7) is a derivative of bisphenol A and is synthesized from this substance. Most commercial Tetrabromobisphenol A products are of a relatively low purity, in fact containing a mixture of products brominated to varying extents. This is not generally considered to be a drawback, since in most applications of this substance (i.e. flame-retarding) it is the average %Br that is of importance. The mixture resulting from the bromination of bisphenol A is therefore not purified, allowing a more efficient, lower cost product.
Tetrabromobisphenol A can be used as reactive and additive flame retardant. In the reactive application, it is bound chemically to the polymers. The main use are epoxy resins of printed circuit boards. As an additive flame retardant it is used in acrylonitrile butadiene styrene.
Tetrabromobisphenol A is used as a reactive flame retardant in epoxy, vinyl esters and polycarbonate resins. The main application of Tetrabromobisphenol A in epoxy resins is in PCB where the bromine content may be 20% by weight. It is used also as a flame retardant in polymers such as ABS, polystyrenes, phenolic resins, adhesives, paper, and textiles and others. It can be combined with a synergist such as antimony trioxide for maximum flame retardant performance. Tetrabromobisphenol A may also be used as a parent compound for the production of other commercial flame retardants.
Tetrabromobisphenol A is the largest volume brominated flame retardant in production today to improve fire safety of mainly electrical and electronic equipment. The main application of this chemical is as a reactive flame retardant in laminates for an estimated 90+% of printed wiring boards. It is also used as an additive flame retardant in ABS plastics. It is chemically bound in these applications and has no potential for emissions to the environment Among all the different flame retardants that can be used in printed wiring boards, Tetrabromobisphenol A is the most well researched flame retardant.
According to both the WHO and the currently undertaken EU Risk Assessments, Tetrabromobisphenol A(CAS NO:79-94-7) has little potential for bioaccumulation and presents no significant health effects of concern. Also, No emissions from circuit boards could be detected Tetrabromobisphenol A is currently being risk-assessed at the EU-level.
Learning more information about Tetrabromobisphenol A, please access to guidechem.Guidechem Chemical Network providing the most complete information of the chemical industry.
2014年2月25日星期二
MSDS information of N,N-Dimethylethanolamine
Basic properties of N,N-Dimethylethanolamine
Molecular Formula: C4H11NO
Synonyms: 2-(Dimethylamino)ethanol; Deanol; 2-Dimethylamine Ethanol;
Appearance: clear to pale yellow liquid
Molecular Weight:89.14
Density:0.888; Boiling Point:139 C; Melting Point:-70 C; Flash Point: 40 C
Storage Temperature: Flammables area
Solubility: miscible in water
Stability:Stable. Flammable. Incompatible with oxidizing agents, copper, copper alloys, zinc, acids, galvanised iron. Hygroscopic.
EINECS: 203-542-8
CAS Registry Number: 108-01-0
Usage:Medication, catalyst
Potential Health Effects
Eye:Contact N,N-Dimethylethanolamine with eyes may cause severe irritation, and possible eye burns. Lachrymator (substance which increases the flow of tears).
Skin: it may cause severe irritation and possible burns, may be harmful if absorbed through the skin.
Ingestion: if ingest it , may cause burns to the digestive tract, may be harmful if swallowed.
Inhalation: N,N-Dimethylethanolamine may cause severe irritation of the respiratory tract with sore throat, coughing, shortness of breath and delayed lung edema.
Chronic: Possible risk of harm to the unborn child.
First Aid Measures
Eyes:Immediately flush eyes with plenty of water for at least 15 minutes, occasionally lifting the upper and lower eyelids. Get medical aid immediately. Do NOT allow victim to rub eyes or keep eyes closed. Extensive irrigation with water is required (at least 30 minutes).
Skin: Get medical aid. Flush skin with plenty of water for at least 15 minutes while removing contaminated clothing and shoes. Wash clothing before reuse. Destroy contaminated shoes.
Ingestion: Never give anything by mouth to an unconscious person. Get medical aid immediately. Do NOT induce vomiting. If conscious and alert, rinse mouth and drink 2-4 cupfuls of milk or water.
Inhalation:Get medical aid immediately. Remove from exposure and move to fresh airimmediately. If not breathing, give artificial respiration. If breathing is difficult, give oxygen.
Fire Fighting Measures
As in any fire, wear a self-contained breathing apparatus in pressure-demand, MSHA/NIOSH (approved or equivalent), and full protective gear. Vapors may form an explosive mixture with air. Vapors can travel to a source of ignition and flash back. Containers may explode in the heat of a fire. Flammable liquid and vapor. Vapors may be heavier than air. They can spread along the ground and collect in low or confined areas.
In case of fire, use water, dry chemical, chemical foam, or alcohol-resistant foam. Do NOT get water inside containers. For large fires, use water spray, fog or alcohol-resistant foam. Cool containers with flooding quantities of water until well after fire is out.
Handling and Storage
Wash thoroughly after handlingN,N-Dimethylethanolamine (CAS NO:108-01-0) .Remove contaminated clothing and wash before reuse. Ground and bond containers when transferring material. Do not get in eyes, on skin, or on clothing. Empty containers retain product residue, (liquid and/or vapor), and can be dangerous. Keep container tightly closed. Do not ingest or inhale. Do not pressurize, cut, weld, braze, solder, drill, grind, or expose empty containers to heat, sparks or open flames. Use only with adequate ventilation. Keep N,N-Dimethylethanolamineaway from heat, sparks and flame.
Store N,N-Dimethylethanolamine in a tightly closed container. Store it in a cool, dry, well-ventilated area away from incompatible substances. Flammables-area. Store protected from light.
Learning more information about N,N-Dimethylethanolamine, please access to guidechem. Guidechem Chemical Network providing the most complete information of the chemical industry.
Molecular Formula: C4H11NO
Synonyms: 2-(Dimethylamino)ethanol; Deanol; 2-Dimethylamine Ethanol;
Appearance: clear to pale yellow liquid
Molecular Weight:89.14
Density:0.888; Boiling Point:139 C; Melting Point:-70 C; Flash Point: 40 C
Storage Temperature: Flammables area
Solubility: miscible in water
Stability:Stable. Flammable. Incompatible with oxidizing agents, copper, copper alloys, zinc, acids, galvanised iron. Hygroscopic.
EINECS: 203-542-8
CAS Registry Number: 108-01-0
Usage:Medication, catalyst
Potential Health Effects
Eye:Contact N,N-Dimethylethanolamine with eyes may cause severe irritation, and possible eye burns. Lachrymator (substance which increases the flow of tears).
Skin: it may cause severe irritation and possible burns, may be harmful if absorbed through the skin.
Ingestion: if ingest it , may cause burns to the digestive tract, may be harmful if swallowed.
Inhalation: N,N-Dimethylethanolamine may cause severe irritation of the respiratory tract with sore throat, coughing, shortness of breath and delayed lung edema.
Chronic: Possible risk of harm to the unborn child.
First Aid Measures
Eyes:Immediately flush eyes with plenty of water for at least 15 minutes, occasionally lifting the upper and lower eyelids. Get medical aid immediately. Do NOT allow victim to rub eyes or keep eyes closed. Extensive irrigation with water is required (at least 30 minutes).
Skin: Get medical aid. Flush skin with plenty of water for at least 15 minutes while removing contaminated clothing and shoes. Wash clothing before reuse. Destroy contaminated shoes.
Ingestion: Never give anything by mouth to an unconscious person. Get medical aid immediately. Do NOT induce vomiting. If conscious and alert, rinse mouth and drink 2-4 cupfuls of milk or water.
Inhalation:Get medical aid immediately. Remove from exposure and move to fresh airimmediately. If not breathing, give artificial respiration. If breathing is difficult, give oxygen.
Fire Fighting Measures
As in any fire, wear a self-contained breathing apparatus in pressure-demand, MSHA/NIOSH (approved or equivalent), and full protective gear. Vapors may form an explosive mixture with air. Vapors can travel to a source of ignition and flash back. Containers may explode in the heat of a fire. Flammable liquid and vapor. Vapors may be heavier than air. They can spread along the ground and collect in low or confined areas.
In case of fire, use water, dry chemical, chemical foam, or alcohol-resistant foam. Do NOT get water inside containers. For large fires, use water spray, fog or alcohol-resistant foam. Cool containers with flooding quantities of water until well after fire is out.
Handling and Storage
Wash thoroughly after handlingN,N-Dimethylethanolamine (CAS NO:108-01-0) .Remove contaminated clothing and wash before reuse. Ground and bond containers when transferring material. Do not get in eyes, on skin, or on clothing. Empty containers retain product residue, (liquid and/or vapor), and can be dangerous. Keep container tightly closed. Do not ingest or inhale. Do not pressurize, cut, weld, braze, solder, drill, grind, or expose empty containers to heat, sparks or open flames. Use only with adequate ventilation. Keep N,N-Dimethylethanolamineaway from heat, sparks and flame.
Store N,N-Dimethylethanolamine in a tightly closed container. Store it in a cool, dry, well-ventilated area away from incompatible substances. Flammables-area. Store protected from light.
Learning more information about N,N-Dimethylethanolamine, please access to guidechem. Guidechem Chemical Network providing the most complete information of the chemical industry.
2014年2月24日星期一
Solve your questions about Mebendazole
Mebendazole is a highly effective, broad-spectrum antihelmintic indicated for the treatment of nematode infestations, including roundworm, whipworm, threadworm, and hookworm. It is poorly absorbed and has no systemic effects. Here I have some questions and answers about this medicine, it may solve your problems.
I have threadworms and took 1 tablet of Mebendazole 4 days ago but still I poop them out?
Mebendazole (CAS NO:31431-39-7) kills the worms, but not their eggs which can survive for two weeks. Therefore, you also need strict hygiene measures for two weeks after taking medication to prevent you from swallowing eggs which may cause a new infection.
You may see dead ones for up to 2 weeks but that is if you dont get RE-infected. If you do then you need another round of meds. These worms eggs can live outside the body for up to 2 weeks also so make sure you wash all your bed clothes and under cloths and wash your hands very well when you are done. Actually just take a shower after you have decontaminated your living area.
Does Mebendazole kill the good intestinal bacteria, or only the worms?
Only the worms. Mebendazole inhibits microtubule formation and glucose uptake in helmiths. Its a spindle poison that inhibits chromosome nondisjunction-in English, it keeps DNA from replicating. It can cause harm to you (more than the normal gut flora), causing low blood cell counts, rashes, and it can cause your liver enzymes to elevate. A well known side effect is diarrhea, nausea and vomiting. Sometimes the cure is worse than the problem.
Would a one time Mebendazole pill kill my tapeworm?
I'm aware of mebendazole being used to treat tapeworm infection. It's normally used for other helminth, yes, but not tapeworm. This is an unlabeled use. That means it's not one suggested by the manufacturer but that doesn't mean it won't work. A lot of drugs have unlabeled uses. Like low doses of aspirin used to help prevent blood clots when it was found to interfere with platelet aggregation.
And how atropine sulfate, for dilating and paralyzing the pupil for eye examination, mebendazole(CAS NO:31431-39-7) is also used to reduce oral secretions when the ophthalmic drops are used under the tongue. Mebendazole was originally developed for other uses but these "side effects" were found to be useful as well. Megace was developed to relieve the symptoms of certain cancers and of AIDS as well as the effects of the treatments for these diseases and the side effect of increased appetite proved to be most beneficial as these conditions typically suppress the appetite and result in weight loss.
Learning more information about mebendazole, please access to guidechem.Guidechem Chemical Network providing the most complete information of the chemical industry.
I have threadworms and took 1 tablet of Mebendazole 4 days ago but still I poop them out?
Mebendazole (CAS NO:31431-39-7) kills the worms, but not their eggs which can survive for two weeks. Therefore, you also need strict hygiene measures for two weeks after taking medication to prevent you from swallowing eggs which may cause a new infection.
You may see dead ones for up to 2 weeks but that is if you dont get RE-infected. If you do then you need another round of meds. These worms eggs can live outside the body for up to 2 weeks also so make sure you wash all your bed clothes and under cloths and wash your hands very well when you are done. Actually just take a shower after you have decontaminated your living area.
Does Mebendazole kill the good intestinal bacteria, or only the worms?
Only the worms. Mebendazole inhibits microtubule formation and glucose uptake in helmiths. Its a spindle poison that inhibits chromosome nondisjunction-in English, it keeps DNA from replicating. It can cause harm to you (more than the normal gut flora), causing low blood cell counts, rashes, and it can cause your liver enzymes to elevate. A well known side effect is diarrhea, nausea and vomiting. Sometimes the cure is worse than the problem.
Would a one time Mebendazole pill kill my tapeworm?
I'm aware of mebendazole being used to treat tapeworm infection. It's normally used for other helminth, yes, but not tapeworm. This is an unlabeled use. That means it's not one suggested by the manufacturer but that doesn't mean it won't work. A lot of drugs have unlabeled uses. Like low doses of aspirin used to help prevent blood clots when it was found to interfere with platelet aggregation.
And how atropine sulfate, for dilating and paralyzing the pupil for eye examination, mebendazole(CAS NO:31431-39-7) is also used to reduce oral secretions when the ophthalmic drops are used under the tongue. Mebendazole was originally developed for other uses but these "side effects" were found to be useful as well. Megace was developed to relieve the symptoms of certain cancers and of AIDS as well as the effects of the treatments for these diseases and the side effect of increased appetite proved to be most beneficial as these conditions typically suppress the appetite and result in weight loss.
Learning more information about mebendazole, please access to guidechem.Guidechem Chemical Network providing the most complete information of the chemical industry.
2014年2月23日星期日
Hot supply Fluorescent Brightener KSN
Chemical and physical properties
Synonyms:Brightener 184; KeyfluorWhite PL; NSC 158163; O-B TECH; OB; TBO; Tinopal OB;
Molecular Formula:C26H26N2O2S Molecular Weight:430.562
Appearance:Bright Yellow powder
Boiling Point:531.2 C at 760 mmHg; Melting Point:196-202 C; Flash Point:275.1 C
Stability:Stable. Incompatible with strong oxidizing agents.
EINECS:230-426-4 CAS Registry Number:7128-64-5
Usages and storage
Fluorescent Brightener KSN is mainly be used in whitening of polyester, polyamide, polyacrylonitrile fiber, the plastic film and all plastic pressing process. It can suitable for synthesizing high polymer including polymeric process. When we store it :Keep container closed when not in use. Store in a tightly closed container. Store in a cool, dry, well-ventilated area away from incompatible substances.
Where find Fluorescent Brightener KSN
Guidechem is just a place for you to look for some chemicals. Guidechem provide the most convenient conditions for the international buyers and let these leads benefit all the business people. Now I will list some suppliers of Fluorescent Brightener KSN in guidechem for you.
AFINE CHEMICALS LIMITED
Updatetime:Feb 21 2014
Min. Order:1/Gram Supply Ability:10 Month/Metric Ton
DetailDesc:OPTICAL BRIGHTENER OB
Tel:86-571-85232161
Address:6th Floor, Block C, 7th Building, Xigang Xinjie, Xihu Industrial Park, Sandun Town, Hangzhou, China
HUTONG GLOBAL CO.,LTD
Updatetime:Feb 21 2014
DetailDesc: CAS Number: 7128-64-5 Molecular formula: C26H26SO2N2 Technical conditions: Appearance: Bright yellow crystal powder Melting point: 198-201centigrade Content: ≥99.0% Use: It is used in thermoplastic plastics. PVC, PE, PP, PS, ABS, SAN, SB, CA, PA, PMMA, acrylic resin.
Tel:86-22-59853797
Address:chagugang,wuqing district,Tianjin,China
Hangzhou Dayangchem Co., Ltd.
Fluorescent Brightener KSN
Updatetime:Feb 21 2014
DetailDesc:2,5-bis-(5-tert-Butyl-2-benzoxazolyl)thiophene
Tel:86-571-88938639
Address:B/2601 Fuli Building, 328# WenEr Rd. Hangzhou City 310012 China
Shanghai Dell Chemical Co.Ltd
Fluorescent Brightener KSN
Updatetime:Feb 19 2014
Purity:NLT99% Min. Order:1/Kilogram Supply Ability:100 Year/Metric Ton
DetailDesc:Shanghai Dell Chemical Co.Ltd. is specialized in trading and developing active pharmaceutical ingredients, intermediates, API, and custom synthesis according to client’s requirements.
Tel:86-21-51950635
Address:Nianjiabang Rd, Pudong, Shanghai
run-biotech Co., Ltd.
Fluorescent Brightener KSN
Updatetime:Feb 08 2014
DetailDesc:2,5-bis(5-tert-butyl-2-benzoxazolyl)thiophene
Tel:86-21-61900721
Address:Room 3-201, No.787, Kangqiao Road, Pudong New District, Shanghai, China
Jinan Haohua Industry Co., Ltd.
Fluorescent Brightener KSN(CAS NO:7128-64-5)
Updatetime:Feb 21 2014
Purity:99 Min. Order:1/Kilogram Supply Ability:100 Year/Metric Ton
Tel:0086-531-58773055
Address:No.59 Gongye South RD
HEBEI CUI FENG IMPORT&EXPORT TRADE CO.,LTD
Fluorescent Brightener KSN
Updatetime:Feb 21 2014
Supply Ability:Success
DetailDesc:2,5-bis-(5-tert-Butyl-2-benzoxazolyl)thiophene
Tel:86-311-80955068
Address:No 98 Gongnong Street,Shijiazhuang Hebei,China
Guidechem provide the most convenient conditions for the international buyers and let these leads benefit all the business people. If you need Fluorescent Brightener KSN or any other chemicals you can access to our Guidechem.
Synonyms:Brightener 184; KeyfluorWhite PL; NSC 158163; O-B TECH; OB; TBO; Tinopal OB;
Molecular Formula:C26H26N2O2S Molecular Weight:430.562
Appearance:Bright Yellow powder
Boiling Point:531.2 C at 760 mmHg; Melting Point:196-202 C; Flash Point:275.1 C
Stability:Stable. Incompatible with strong oxidizing agents.
EINECS:230-426-4 CAS Registry Number:7128-64-5
Usages and storage
Fluorescent Brightener KSN is mainly be used in whitening of polyester, polyamide, polyacrylonitrile fiber, the plastic film and all plastic pressing process. It can suitable for synthesizing high polymer including polymeric process. When we store it :Keep container closed when not in use. Store in a tightly closed container. Store in a cool, dry, well-ventilated area away from incompatible substances.
Where find Fluorescent Brightener KSN
Guidechem is just a place for you to look for some chemicals. Guidechem provide the most convenient conditions for the international buyers and let these leads benefit all the business people. Now I will list some suppliers of Fluorescent Brightener KSN in guidechem for you.
AFINE CHEMICALS LIMITED
Updatetime:Feb 21 2014
Min. Order:1/Gram Supply Ability:10 Month/Metric Ton
DetailDesc:OPTICAL BRIGHTENER OB
Tel:86-571-85232161
Address:6th Floor, Block C, 7th Building, Xigang Xinjie, Xihu Industrial Park, Sandun Town, Hangzhou, China
HUTONG GLOBAL CO.,LTD
Updatetime:Feb 21 2014
DetailDesc: CAS Number: 7128-64-5 Molecular formula: C26H26SO2N2 Technical conditions: Appearance: Bright yellow crystal powder Melting point: 198-201centigrade Content: ≥99.0% Use: It is used in thermoplastic plastics. PVC, PE, PP, PS, ABS, SAN, SB, CA, PA, PMMA, acrylic resin.
Tel:86-22-59853797
Address:chagugang,wuqing district,Tianjin,China
Hangzhou Dayangchem Co., Ltd.
Fluorescent Brightener KSN
Updatetime:Feb 21 2014
DetailDesc:2,5-bis-(5-tert-Butyl-2-benzoxazolyl)thiophene
Tel:86-571-88938639
Address:B/2601 Fuli Building, 328# WenEr Rd. Hangzhou City 310012 China
Shanghai Dell Chemical Co.Ltd
Fluorescent Brightener KSN
Updatetime:Feb 19 2014
Purity:NLT99% Min. Order:1/Kilogram Supply Ability:100 Year/Metric Ton
DetailDesc:Shanghai Dell Chemical Co.Ltd. is specialized in trading and developing active pharmaceutical ingredients, intermediates, API, and custom synthesis according to client’s requirements.
Tel:86-21-51950635
Address:Nianjiabang Rd, Pudong, Shanghai
run-biotech Co., Ltd.
Fluorescent Brightener KSN
Updatetime:Feb 08 2014
DetailDesc:2,5-bis(5-tert-butyl-2-benzoxazolyl)thiophene
Tel:86-21-61900721
Address:Room 3-201, No.787, Kangqiao Road, Pudong New District, Shanghai, China
Jinan Haohua Industry Co., Ltd.
Fluorescent Brightener KSN(CAS NO:7128-64-5)
Updatetime:Feb 21 2014
Purity:99 Min. Order:1/Kilogram Supply Ability:100 Year/Metric Ton
Tel:0086-531-58773055
Address:No.59 Gongye South RD
HEBEI CUI FENG IMPORT&EXPORT TRADE CO.,LTD
Fluorescent Brightener KSN
Updatetime:Feb 21 2014
Supply Ability:Success
DetailDesc:2,5-bis-(5-tert-Butyl-2-benzoxazolyl)thiophene
Tel:86-311-80955068
Address:No 98 Gongnong Street,Shijiazhuang Hebei,China
Guidechem provide the most convenient conditions for the international buyers and let these leads benefit all the business people. If you need Fluorescent Brightener KSN or any other chemicals you can access to our Guidechem.
2014年2月21日星期五
Different studies on Bromacil lithium salt
Bromacil lithium salt is a light tan solid at room temperature. It has a mass of 267 D. It is not routinely produced as a solid. Rather, for commercial use it is prepared by dissolving bromacil in a solution of lithium hydroxide(LiOH). A laboratory preparation of bromacil lithium salt for regulatory study purposes used a ratio of 6 moles LiOH to one mole bromacil in methanol solvent.
OEHHA does not have information on the molar ratio or solvent used for commercial purposes. Commercial preparations supplied for regulatory testing purposes were reported to be an amber liquid which contained 21-22% bromacil lithium salt.
Bromacil lithium salt (CAS NO. :7726-95-6) is an herbicide which inhibits photosynthesis. It is used for weed control on rights-of-way. In California, 4,478 lbs were applied in the year 2000. Bromacil lithium salt is produced for commercial use by dissolving bromacil in a solution of lithium hydroxide. It is a weak organic acid, with limited solubility. Much greater solubility is achieved in the ionic form produced by reaction with lithium hydroxide.
Developmental studies with Bromacil lithium salt in experimental animals have found adverse effects including death of the embryo, fetus, or pup, malformations, and retarded development. While several studies have not found similar effects, multiple differences in study design make comparisons difficult. Developmental studies in rats by gavage found roughly similar molar levels of bromacil and lithium required to produce adverse developmental effects.
A small study with Bromacil lithium salt in humans found no association with alterations of the menstrual cycle or reproductive hormones in healthy females treated at therapeutic doses of Bromacil lithium salt. Two small studies found no association of female sexual dysfunction with Bromacil lithium salt treatment. Some studies in mice and rats treated with this compound have found reduced female reproductive capacity.
However, several other studies have not found such effects. Multiple differences in study design make comparisons difficult. Adverse changes in parenting behavior have been observed in rats treated with lithium orally or by injection, and pup death or developmental delay has been reported after lactational exposure to lithium.
Reproductive studies with Bromacil lithium salt(CAS NO. :7726-95-6) in rats and mice, and chronic studies in rats and dogs have found no adverse male reproductive effects. A chronic study in mice found increased testicular atrophy among mice treated with high doses of bromacil in diet for 12-18 months. Testis weights in bromacil-treated mice that survived to terminal necropsy were not affected.
Learning more information about Bromacil lithium salt, please access to guidechem. Guidechem Chemical Network providing the most complete information of the chemical industry.
OEHHA does not have information on the molar ratio or solvent used for commercial purposes. Commercial preparations supplied for regulatory testing purposes were reported to be an amber liquid which contained 21-22% bromacil lithium salt.
Bromacil lithium salt (CAS NO. :7726-95-6) is an herbicide which inhibits photosynthesis. It is used for weed control on rights-of-way. In California, 4,478 lbs were applied in the year 2000. Bromacil lithium salt is produced for commercial use by dissolving bromacil in a solution of lithium hydroxide. It is a weak organic acid, with limited solubility. Much greater solubility is achieved in the ionic form produced by reaction with lithium hydroxide.
Developmental studies with Bromacil lithium salt in experimental animals have found adverse effects including death of the embryo, fetus, or pup, malformations, and retarded development. While several studies have not found similar effects, multiple differences in study design make comparisons difficult. Developmental studies in rats by gavage found roughly similar molar levels of bromacil and lithium required to produce adverse developmental effects.
A small study with Bromacil lithium salt in humans found no association with alterations of the menstrual cycle or reproductive hormones in healthy females treated at therapeutic doses of Bromacil lithium salt. Two small studies found no association of female sexual dysfunction with Bromacil lithium salt treatment. Some studies in mice and rats treated with this compound have found reduced female reproductive capacity.
However, several other studies have not found such effects. Multiple differences in study design make comparisons difficult. Adverse changes in parenting behavior have been observed in rats treated with lithium orally or by injection, and pup death or developmental delay has been reported after lactational exposure to lithium.
Reproductive studies with Bromacil lithium salt(CAS NO. :7726-95-6) in rats and mice, and chronic studies in rats and dogs have found no adverse male reproductive effects. A chronic study in mice found increased testicular atrophy among mice treated with high doses of bromacil in diet for 12-18 months. Testis weights in bromacil-treated mice that survived to terminal necropsy were not affected.
Learning more information about Bromacil lithium salt, please access to guidechem. Guidechem Chemical Network providing the most complete information of the chemical industry.
2014年2月20日星期四
The Metabolism of D(+)-Sucrose
D(+)-Sucrose is a crystalline disaccharide of fructose and glucose, also called saccharose, with Molecular Formula: C12H22O11, found in many plants but extracted as ordinary sugar mainly from sugar cane and sugar beets. It is widely used as a sweetener or preservative and in the manufacture of plastics and soaps.
In humans and other mammals, D(+)-Sucrose is broken down into its constituent monosaccharides, glucose and fructose, by sucrase or isomaltase glycoside hydrolases, which are located in the membrane of the microvilli lining the duodenum. The resulting glucose and fructose molecules are then rapidly absorbed into the bloodstream. In bacteria and some animals, D(+)-Sucrose is digested by the enzyme invertase.
D(+)-Sucrose is a nonreducing disaccharide composed of glucose and fructose linked via their anomeric carbons. It is obtained commercially from sugarcane, sugar beet , and other plants and used extensively as a food and a sweetener.
D(+)-Sucrose(CAS NO: 57-50-1) is an easily assimilated macronutrient that provides a quick source of energy, provoking a rapid rise in blood glucose upon ingestion. D(+)-Sucrose, as a pure carbohydrate, has an energy content of 3.94 kilocalories per gram.Overconsumption of D(+)-Sucrose has been linked with adverse health effects.Dental caries or tooth decay may be caused by oral bacteria converting sugars, including D(+)-Sucrose, from food into acids that attack tooth enamel.
When large amounts of refined food that contain high percentages of D(+)-Sucrose are consumed, beneficial nutrients can be displaced from the diet, which can contribute to an increased risk for chronic disease. The rapidity with which D(+)-Sucrose raises blood glucose can cause problems for people suffering from defective glucose metabolism, such as persons with hypoglycemia or diabetes mellitus.
D(+)-Sucrose can contribute to the development of metabolic syndrome. In an experiment with rats that were fed a diet one-third of which was D(+)-Sucrose(CAS NO: 57-50-1), the D(+)-Sucrose first elevated blood levels of triglycerides, which induced visceral fat and ultimately resulted in insulin resistance.
Another study found that rats fed D(+)-Sucrose-rich diets developed high triglycerides, hyperglycemia, and insulin resistance. A 2004 study recommended that the consumption of D(+)-Sucrose-containing drinks should be limited due to the growing number of people with obesity and insulin resistance.
Human beings have long sought sugars, but aside from wild honey, have not had access to the large quantities that characterize the modern diet. Studies have indicated potential links between consumption of free sugars including D(+)-Sucrose and health hazards, including obesity and tooth decay. It is also considered as a source of endogenous glycation processes.
Guidechem provide the most convenient conditions for the international buyers and let these leads benefit all the business people. If you need D(+)-Sucrose or any other chemicals you can access to our Guidechem.
In humans and other mammals, D(+)-Sucrose is broken down into its constituent monosaccharides, glucose and fructose, by sucrase or isomaltase glycoside hydrolases, which are located in the membrane of the microvilli lining the duodenum. The resulting glucose and fructose molecules are then rapidly absorbed into the bloodstream. In bacteria and some animals, D(+)-Sucrose is digested by the enzyme invertase.
D(+)-Sucrose is a nonreducing disaccharide composed of glucose and fructose linked via their anomeric carbons. It is obtained commercially from sugarcane, sugar beet , and other plants and used extensively as a food and a sweetener.
D(+)-Sucrose(CAS NO: 57-50-1) is an easily assimilated macronutrient that provides a quick source of energy, provoking a rapid rise in blood glucose upon ingestion. D(+)-Sucrose, as a pure carbohydrate, has an energy content of 3.94 kilocalories per gram.Overconsumption of D(+)-Sucrose has been linked with adverse health effects.Dental caries or tooth decay may be caused by oral bacteria converting sugars, including D(+)-Sucrose, from food into acids that attack tooth enamel.
When large amounts of refined food that contain high percentages of D(+)-Sucrose are consumed, beneficial nutrients can be displaced from the diet, which can contribute to an increased risk for chronic disease. The rapidity with which D(+)-Sucrose raises blood glucose can cause problems for people suffering from defective glucose metabolism, such as persons with hypoglycemia or diabetes mellitus.
D(+)-Sucrose can contribute to the development of metabolic syndrome. In an experiment with rats that were fed a diet one-third of which was D(+)-Sucrose(CAS NO: 57-50-1), the D(+)-Sucrose first elevated blood levels of triglycerides, which induced visceral fat and ultimately resulted in insulin resistance.
Another study found that rats fed D(+)-Sucrose-rich diets developed high triglycerides, hyperglycemia, and insulin resistance. A 2004 study recommended that the consumption of D(+)-Sucrose-containing drinks should be limited due to the growing number of people with obesity and insulin resistance.
Human beings have long sought sugars, but aside from wild honey, have not had access to the large quantities that characterize the modern diet. Studies have indicated potential links between consumption of free sugars including D(+)-Sucrose and health hazards, including obesity and tooth decay. It is also considered as a source of endogenous glycation processes.
Guidechem provide the most convenient conditions for the international buyers and let these leads benefit all the business people. If you need D(+)-Sucrose or any other chemicals you can access to our Guidechem.
2014年2月19日星期三
Summarize basic information of Naphthalene
Naphthalene is a white to almost white crystals or crystalline flakewith formula C10H8. It is the simplest polycyclic aromatic hydrocarbon As an aromatic hydrocarbon, naphthalene's structure consists of a fused pair of benzene rings. It is best known as the main ingredient of traditional mothballs.
Naphthalene is used in the production of phthalic anhydride; it is also used in mothballs. Acute exposure of humans to naphthalene by inhalation, ingestion, and dermal contact is associated with hemolytic anemia, damage to the liver, and neurological damage. Cataracts have also been reported in workers acutely exposed to naphthalene by inhalation and ingestion.Chronic (long-term) exposure of workers and rodents to naphthalene has been reported to cause cataracts and damage to the retina.
Trace amounts of naphthalene(CAS NO:91-20-3) are produced by magnolias and specific types of deer, as well as the Formosan subterranean termite, possibly produced by the termite as a repellant against "ants, poisonous fungi and nematode worms."Some strains of the endophytic fungus Muscodor albus produce naphthalene among a range of volatile organic compounds, while Muscodor vitigenus produces naphthalene almost exclusively.Naphthalene has been found in meteorites. It has also been discovered in the interstellar medium in the direction of the star Cernis 52 in the constellation Perseus.
When naphthalene gas is inhaled, the body breaks it down into other chemicals that react with cells in the body and damage tissues. How naphthalene kills moths is not understood. The odor is thought to be unpleasant enough to drive animals away in repellent products.
Individuals may be exposed to naphthalene through the use of mothballs. Workers may be occupationally exposed to it during its manufacture and use, especially in coal-tar production, wood preserving, tanning, or ink and dye production.
Naphthalene is released to the air from the burning of coal and oil and from the use of mothballs. Coal tar production, wood preserving, and other industries release small amounts. Typical air concentrations of naphthalene in cities are about 0.18 parts per billion (ppb). It has also been detected in tobacco smoke.
In humans, naphthalene is broken down to alpha-naphthol, which is linked to the development of hemolytic anemia. Kidney and liver damage may also occur. Alpha-naphthol and other metabolites are excreted in urine.
In animals, naphthalene breaks down into other compounds including alpha-naphthol, which may affect the lungs and eyes. Naphthalene(CAS NO:91-20-3) was found in the milk of exposed cows, but the residues disappeared quickly after the cows were no longer exposed. Nearly all the naphthalene was broken down into other compounds and excreted in their urine.
Learning more information about Naphthalene, you can access to Guidechem.Guidechem chemical B2B network provides information on china and global chemical market quotation and relative chemical Information.
Naphthalene is used in the production of phthalic anhydride; it is also used in mothballs. Acute exposure of humans to naphthalene by inhalation, ingestion, and dermal contact is associated with hemolytic anemia, damage to the liver, and neurological damage. Cataracts have also been reported in workers acutely exposed to naphthalene by inhalation and ingestion.Chronic (long-term) exposure of workers and rodents to naphthalene has been reported to cause cataracts and damage to the retina.
Trace amounts of naphthalene(CAS NO:91-20-3) are produced by magnolias and specific types of deer, as well as the Formosan subterranean termite, possibly produced by the termite as a repellant against "ants, poisonous fungi and nematode worms."Some strains of the endophytic fungus Muscodor albus produce naphthalene among a range of volatile organic compounds, while Muscodor vitigenus produces naphthalene almost exclusively.Naphthalene has been found in meteorites. It has also been discovered in the interstellar medium in the direction of the star Cernis 52 in the constellation Perseus.
When naphthalene gas is inhaled, the body breaks it down into other chemicals that react with cells in the body and damage tissues. How naphthalene kills moths is not understood. The odor is thought to be unpleasant enough to drive animals away in repellent products.
Individuals may be exposed to naphthalene through the use of mothballs. Workers may be occupationally exposed to it during its manufacture and use, especially in coal-tar production, wood preserving, tanning, or ink and dye production.
Naphthalene is released to the air from the burning of coal and oil and from the use of mothballs. Coal tar production, wood preserving, and other industries release small amounts. Typical air concentrations of naphthalene in cities are about 0.18 parts per billion (ppb). It has also been detected in tobacco smoke.
In humans, naphthalene is broken down to alpha-naphthol, which is linked to the development of hemolytic anemia. Kidney and liver damage may also occur. Alpha-naphthol and other metabolites are excreted in urine.
In animals, naphthalene breaks down into other compounds including alpha-naphthol, which may affect the lungs and eyes. Naphthalene(CAS NO:91-20-3) was found in the milk of exposed cows, but the residues disappeared quickly after the cows were no longer exposed. Nearly all the naphthalene was broken down into other compounds and excreted in their urine.
Learning more information about Naphthalene, you can access to Guidechem.Guidechem chemical B2B network provides information on china and global chemical market quotation and relative chemical Information.
2014年2月18日星期二
Tosyl chloride in organic synthesis
Tosyl chloride, we also call it 4-Toluene sulfochloride or 4-Methylbenzenesulfonyl chloride. It is a white to yellow solid with Molecular Formula: C7H7ClO2S and Molecular Weight: 190.64. It is insoluble in water, stable,substances to be avoided include strong bases and strong oxidizing agents and water and moisture sensitive.
Tosyl chloride(CAS NO: 98-59-9) is a reagent widely used in organic synthesis. Abbreviated TsCl or TosCl, it is a derivative of toluene and contains a sulfonyl chloride functional group. Being a widely available reagent, TsCl has been heavily examined from the perspective of reactivity. It is used in dehydrations to make nitriles, isocyanides, diimides. In an unusual reaction focusing on the sulfur center, zinc reduces TsCl to the sulfinate, CH3C6H4SO2Na.
In characteristic manner, Tosyl chloride converts alcohols (abbreviated ROH) into the corresponding toluenesulfonate esters, or tosyl derivatives. It can be cleaved with lithium aluminium hydride, thus, Tosyl chloride followed by reduction allows for removal of a hydroxyl group. Likewise, it is used to prepare sulfonamides from amines.
The preparation of tosyl esters and amides are conducted in the presence of a base, which absorbs hydrogen chloride. The selection of the base is often crucial to the efficiency of tosylation. Typical bases include pyridine and triethylamine. Unusual bases are also used; for example, catalytic amounts of trimethylammonium chloride in the presence of triethylamine is highly effective by virtue of the trimethylamine.
But what is the role and mechanism of action of tosyl chloride in organic synthesis?
Tosyl chloride (TsCl) is usually used as an activating group for primary alcohols. Due to its relatively large volume and the lower reactivity of secondary and tertiary alcohols, it usually doesn't come into them, being selective to primary alcohols in most of the cases. The -OTs group formed is a good leaving group for substitution reactions. So, using this reagent, it is easier to change functionalities, for example -OH for -N3, -OH for -NHR or -NR2.
Theoretically it is possible to use this group as a protective group also, recovering the -OH treating with NaOH. But I have never seen this use since there are many better protecting groups for alcohols available.
The introduction of Tosyl chloride(CAS NO: 98-59-9) in the alcohol follows a similar mechanism than any usual ester formation between an alcohol and a acid chloride, but in this case is not a carboxilic acid, it is a sulfonic acid. For the substitution, a SN2 mechanism occurs, leaving the p-toluensulfonic acid anion.
Guidechem provide the most convenient conditions for the international buyers and let these leads benefit all the business people. If you need Tosyl chloride or any other chemicals you can access to our Guidechem.
Tosyl chloride(CAS NO: 98-59-9) is a reagent widely used in organic synthesis. Abbreviated TsCl or TosCl, it is a derivative of toluene and contains a sulfonyl chloride functional group. Being a widely available reagent, TsCl has been heavily examined from the perspective of reactivity. It is used in dehydrations to make nitriles, isocyanides, diimides. In an unusual reaction focusing on the sulfur center, zinc reduces TsCl to the sulfinate, CH3C6H4SO2Na.
In characteristic manner, Tosyl chloride converts alcohols (abbreviated ROH) into the corresponding toluenesulfonate esters, or tosyl derivatives. It can be cleaved with lithium aluminium hydride, thus, Tosyl chloride followed by reduction allows for removal of a hydroxyl group. Likewise, it is used to prepare sulfonamides from amines.
The preparation of tosyl esters and amides are conducted in the presence of a base, which absorbs hydrogen chloride. The selection of the base is often crucial to the efficiency of tosylation. Typical bases include pyridine and triethylamine. Unusual bases are also used; for example, catalytic amounts of trimethylammonium chloride in the presence of triethylamine is highly effective by virtue of the trimethylamine.
But what is the role and mechanism of action of tosyl chloride in organic synthesis?
Tosyl chloride (TsCl) is usually used as an activating group for primary alcohols. Due to its relatively large volume and the lower reactivity of secondary and tertiary alcohols, it usually doesn't come into them, being selective to primary alcohols in most of the cases. The -OTs group formed is a good leaving group for substitution reactions. So, using this reagent, it is easier to change functionalities, for example -OH for -N3, -OH for -NHR or -NR2.
Theoretically it is possible to use this group as a protective group also, recovering the -OH treating with NaOH. But I have never seen this use since there are many better protecting groups for alcohols available.
The introduction of Tosyl chloride(CAS NO: 98-59-9) in the alcohol follows a similar mechanism than any usual ester formation between an alcohol and a acid chloride, but in this case is not a carboxilic acid, it is a sulfonic acid. For the substitution, a SN2 mechanism occurs, leaving the p-toluensulfonic acid anion.
Guidechem provide the most convenient conditions for the international buyers and let these leads benefit all the business people. If you need Tosyl chloride or any other chemicals you can access to our Guidechem.
The environmental fate of 3-Aminophenol
3-Aminophenol is a kind of white crystals with formula C6H4(NH2)(OH). It is an aromatic amine and aromatic alcohol. It is an isomer of 2-aminophenol and 4-aminophenol. It can be prepared by caustic fusion of metanilic acid.One of the most relevant applications of the substance is the synthesis of 3-(diethylamino)phenol, key intermediate for the preparation of several fluorescent dyes.
A method of dehydrogenating 3-amino-2-cyclohexene-1-one with a supported palladium or palladium-platinum catalyst in a solvent in the presence of base to produce 3-Aminophenol(CAS NO:591-27-5) and its use directly without purification to produce 3,4'-oxydianiline.
3-Aminophenol is purified by vacuum distillation. Alternatively, resorcinol reacts with ammonia, for example, in the presence of diammonium phosphate and arsenic pentoxide or ammonium sulfite to form 3-aminophenol. The compound also may be made by hydrolysis of 3-aminoaniline.
3-Aminophenol's production and use as a hair dye and chemical intermediate may result in its release to the environment through various waste streams. If released to air, an estimated vapor pressure of 1.86X10-3 mm Hg at 25 deg C indicates 3-aminophenol will exist solely as a vapor in the atmosphere.
3-Aminophenol absorbs light at wavelengths of 270 nm (0.1 M HCl) and therefore is not expected to be susceptible to direct photolysis by sunlight. If released to soil, it is expected to have high mobility based upon an estimated Koc of 90. However, anilines are expected to bind strongly to humus or organic matter in soils due to the high reactivity of the aromatic amino group, suggesting that mobility may be much lower in some soils.
3-Aminophenol is amphoteric and behaves either as a weak acid or weak base; the basic character usually predominates. Volatilization from moist soil surfaces is not expected to be an important fate process based upon an estimated Henry's Law constant of 2.7X10-10 atm-cu m/mole. Utilizing the Japanese MITI test, 0% of the theoretical BOD was reached in 4 weeks, indicating that biodegradation may not be an important environmental fate process.
If released into water, 3-aminophenol may adsorb to suspended solids and sediment based upon the estimated Koc. Based on two grab studies, 3-aminophenol(CAS NO:591-27-5) appears to be slowly mineralized, from 0.4 to 0.7% per day, in aquifer solids and degraded by 37% in 16 days in soil.
Hydrolysis is not expected to be an important environmental fate process since this compound lacks functional groups that hydrolyze under environmental conditions. Occupational exposure to it may occur through dermal contact with this compound at workplaces where it is produced or used. Use data indicate that the general population may be exposed to 3-aminophenol via dermal contact with consumer products, particularly hair dye products, containing 3-aminophenol.
Guidechem provide the most convenient conditions for the international buyers and let these leads benefit all the business people. If you need 3-Aminophenol or any other chemicals you can access to our Guidechem.
A method of dehydrogenating 3-amino-2-cyclohexene-1-one with a supported palladium or palladium-platinum catalyst in a solvent in the presence of base to produce 3-Aminophenol(CAS NO:591-27-5) and its use directly without purification to produce 3,4'-oxydianiline.
3-Aminophenol is purified by vacuum distillation. Alternatively, resorcinol reacts with ammonia, for example, in the presence of diammonium phosphate and arsenic pentoxide or ammonium sulfite to form 3-aminophenol. The compound also may be made by hydrolysis of 3-aminoaniline.
3-Aminophenol's production and use as a hair dye and chemical intermediate may result in its release to the environment through various waste streams. If released to air, an estimated vapor pressure of 1.86X10-3 mm Hg at 25 deg C indicates 3-aminophenol will exist solely as a vapor in the atmosphere.
3-Aminophenol absorbs light at wavelengths of 270 nm (0.1 M HCl) and therefore is not expected to be susceptible to direct photolysis by sunlight. If released to soil, it is expected to have high mobility based upon an estimated Koc of 90. However, anilines are expected to bind strongly to humus or organic matter in soils due to the high reactivity of the aromatic amino group, suggesting that mobility may be much lower in some soils.
3-Aminophenol is amphoteric and behaves either as a weak acid or weak base; the basic character usually predominates. Volatilization from moist soil surfaces is not expected to be an important fate process based upon an estimated Henry's Law constant of 2.7X10-10 atm-cu m/mole. Utilizing the Japanese MITI test, 0% of the theoretical BOD was reached in 4 weeks, indicating that biodegradation may not be an important environmental fate process.
If released into water, 3-aminophenol may adsorb to suspended solids and sediment based upon the estimated Koc. Based on two grab studies, 3-aminophenol(CAS NO:591-27-5) appears to be slowly mineralized, from 0.4 to 0.7% per day, in aquifer solids and degraded by 37% in 16 days in soil.
Hydrolysis is not expected to be an important environmental fate process since this compound lacks functional groups that hydrolyze under environmental conditions. Occupational exposure to it may occur through dermal contact with this compound at workplaces where it is produced or used. Use data indicate that the general population may be exposed to 3-aminophenol via dermal contact with consumer products, particularly hair dye products, containing 3-aminophenol.
Guidechem provide the most convenient conditions for the international buyers and let these leads benefit all the business people. If you need 3-Aminophenol or any other chemicals you can access to our Guidechem.
2014年2月17日星期一
Something about taking Pantoprazole Sodium
Pantoprazole sodium is a white to off-white crystalline powder and is racemic. Pantoprazole has weakly basic and acidic properties. Pantoprazole sodium is freely soluble in water, very slightly soluble in phosphate buffer at pH 7.4, and practically insoluble in n-hexane. It is also known as Pantoprozole soclium Ph.Eur, with Molecular Formula :C16H35F2N3NaO4S and Molecular Weight:426.52.
Pantoprazole sodium(CAS NO:138786-67-1) is a prescription drug that is most commonly used to remedy situations where there is an excess of stomach acid. It is therefore classified as a proton-pump inhibitor; highly potent drugs that have the primary function of reducing gastric acid production for long durations.
It is usually sold under the brand name Protonix, which comes in two forms. The first form is the Protonix tablets that operate as delayed-release and come in either 20 milligrams or 40 milligrams. The second is Protonix IV, which also operates as delayed-release in 40 milligrams but is instead administered by direct injection.
It can take several days before your stomach pain gets better. Check with your doctor or health care professional if your condition does not start to get better, or if it gets worse.You may need blood work done while you are taking Pantoprazole Sodium.
A numerous and extensive list of side effects can be found by reading this article.A few less severe side effects are headaches, diarrhea, stomach pain, nausea and slight skin rash.
Some of the more serious ones of Pantoprazole Sodium include hives, hand, face or mouth swelling, tightened chest, problems breathing, severe skin rash, heavy dizziness, increased heart rate, spasms in muscles, unceasing and intense diarrhea or stomach pains, and/or seizures.
Side effects of Pantoprazole Sodium that you should report to your doctor or health care professional as soon as possible:
allergic reactions like skin rash, itching or hives, swelling of the face, lips, or tongue;bone, muscle or joint pain;redness, blistering, peeling or loosening of the skin, including inside the mouth; breathing problems;seizures;chest pain or chest tightness;dark yellow or brown urine; dizziness; fast, irregular heartbeat;feeling faint or lightheaded;fever or sore throat;muscle spasm; palpitations; tremors;unusual bleeding or bruising;unusually weak or tired;yellowing of the eyes or skin.
Side effects of Pantoprazole Sodium that usually do not require medical attention (Report these to your doctor or health care professional if they continue or are bothersome.):constipation; diarrhea; dry mouth; headache; nausea.
This list may not all the Side effects of Pantoprazole Sodium(CAS NO:138786-67-1), you should call your doctor for medical advice about side effects
If you need take Pantoprazole Sodium, you should pay more attention to it. Learning more health information, properties or suppliers about Pantoprazole Sodium, you can access Guidechem. Guidechem chemical B2B network provides information on china and global chemical market quotation and relative chemical Information.
Pantoprazole sodium(CAS NO:138786-67-1) is a prescription drug that is most commonly used to remedy situations where there is an excess of stomach acid. It is therefore classified as a proton-pump inhibitor; highly potent drugs that have the primary function of reducing gastric acid production for long durations.
It is usually sold under the brand name Protonix, which comes in two forms. The first form is the Protonix tablets that operate as delayed-release and come in either 20 milligrams or 40 milligrams. The second is Protonix IV, which also operates as delayed-release in 40 milligrams but is instead administered by direct injection.
It can take several days before your stomach pain gets better. Check with your doctor or health care professional if your condition does not start to get better, or if it gets worse.You may need blood work done while you are taking Pantoprazole Sodium.
A numerous and extensive list of side effects can be found by reading this article.A few less severe side effects are headaches, diarrhea, stomach pain, nausea and slight skin rash.
Some of the more serious ones of Pantoprazole Sodium include hives, hand, face or mouth swelling, tightened chest, problems breathing, severe skin rash, heavy dizziness, increased heart rate, spasms in muscles, unceasing and intense diarrhea or stomach pains, and/or seizures.
Side effects of Pantoprazole Sodium that you should report to your doctor or health care professional as soon as possible:
allergic reactions like skin rash, itching or hives, swelling of the face, lips, or tongue;bone, muscle or joint pain;redness, blistering, peeling or loosening of the skin, including inside the mouth; breathing problems;seizures;chest pain or chest tightness;dark yellow or brown urine; dizziness; fast, irregular heartbeat;feeling faint or lightheaded;fever or sore throat;muscle spasm; palpitations; tremors;unusual bleeding or bruising;unusually weak or tired;yellowing of the eyes or skin.
Side effects of Pantoprazole Sodium that usually do not require medical attention (Report these to your doctor or health care professional if they continue or are bothersome.):constipation; diarrhea; dry mouth; headache; nausea.
This list may not all the Side effects of Pantoprazole Sodium(CAS NO:138786-67-1), you should call your doctor for medical advice about side effects
If you need take Pantoprazole Sodium, you should pay more attention to it. Learning more health information, properties or suppliers about Pantoprazole Sodium, you can access Guidechem. Guidechem chemical B2B network provides information on china and global chemical market quotation and relative chemical Information.
2014年2月16日星期日
If you are doing 5-Methoxyindole-3-carboxaldehyde business
5-Methoxyindole-3-carboxaldehyde, is also known as 3-Formyl-5-methoxyindole. It belongs to the product categories of Blocks; Its EINECS registry number is 234-220-5. This chemical's molecular formula is C10H9NO2 and molecular weight is 175.18396. Its IUPAC name is called 5-methoxy-1H-indole-3-carbaldehyde. 5-Methoxyindole-3-carboxaldehyde is yellowish to beige crystalline powder or needles , with the CAS registry number 10601-19-1. It should be sealed and stored in cool and dry place.
It can be prepared by 5-methoxy-indole and N,N-dimethyl-formamide. This reaction will need reagent phosphoryl chloride. It is insoluble in water, stable under normal temperatures and pressures.It can be used to produce 5-methoxy-3-(1-pyrrolidinylmethylene)-3H-indole by heating. This reaction will need solvent benzene with reaction time of 2 hours.
When you store 5-Methoxyindole-3-carboxaldehyde: Keep container closed when not in use. Store in a tightly closed container. Store in a cool, dry, well-ventilated area away from incompatible substances.
When you are using 5-Methoxyindole-3-carboxaldehyde, please be cautious about it as the following: This chemical may cause inflammation to the skin or other mucous membranes. It is irritating to eyes, respiratory system and skin. You must avoid contacting it with skin and eyes.
If you do 5-Methoxyindole-3-carboxaldehyde business or you just need some this chemical, you can choose suppliers in guidechem. Here are some suppliers of this compound in Guidechem.
1.Capot Chemical Co., Ltd.
Updatetime:Feb 13 2014
Purity:98% Min. Order:1/Kilogram Supply Ability:up to kgs Month/Kilogram
DetailDesc:175.18,C10H9NO2
Tel:86-571-85586718
Address:Joinhands Science Park, No.4028,Nanhuan Road
2.Hangzhou Dayangchem Co., Ltd.
5-Methoxyindole-3-aldehyde
Updatetime:Feb 13 2014
DetailDesc:5-Methoxyindole-3-aldehyde
Tel:86-571-88938639
Address:B/2601 Fuli Building, 328# WenEr Rd. Hangzhou City 310012 China
3.Shanghai Dell Chemical Co.Ltd
Updatetime:Feb 12 2014
Purity:NLT99% Min. Order:1/Kilogram Supply Ability:100 Year/Metric Ton
DetailDesc:Shanghai Dell Chemical Co.Ltd. is specialized in trading and developing active pharmaceutical ingredients, intermediates, API, and custom synthesis according to client’s requirements.
Tel:86-21-51950635
Address:Nianjiabang Rd, Pudong, Shanghai
4.Wuhan Fortuna Chemical Co., Ltd.
5-Methoxyindole-3-carboxaldehyde(CAS NO:10601-19-1)
Updatetime:Feb 11 2014
Min. Order:1/25/1000/Kilogram
DetailDesc:5-Methoxyindole-3-carboxaldehyde
Tel:0086-27-59207850
Address:A2705,Dong Yi Shi Qu,129# XinHua Road
5.Struchem Co Ltd
5-Methoxyindole-3-carboxaldehyde
Updatetime:Jan 14 2014
Purity:95%min Min. Order:1,5,25/Gram Supply Ability:kilograms Day/kilograms
Tel:86-512-63009836
Address:No. 2358 Chang'an Rd, Wujiang City, JiangSu Province, China 215200
Introduction:Based on BetaPharma(Shanghai) Co., Ltd, Struchem Co.,Ltd estabalished on 2010, the company's business scope covers special chemicals, agro-chemicals, APIs, natural ingredients Commodity Chemicals, intermediates & fragments and custom synthesis & manufacture.
6.Nanjing Norris-Pharm Technology Co., Ltd.
5-Methoxyindole-3-carboxaldehyde
Updatetime:Mar 29 2013
Purity:97% Min. Order:
DetailDesc:Pharmaceutical intermediates
Tel:86-25-66112881
Address:A1100 Cultural and Creative Industrial Park 5th Jiangning Road Nanjing 210006 China
Guidechem provide the most convenient conditions for the international buyers and let these leads benefit all the business people. If you need 5-Methoxyindole-3-carboxaldehyde or any other chemicals you can access to our Guidechem.
It can be prepared by 5-methoxy-indole and N,N-dimethyl-formamide. This reaction will need reagent phosphoryl chloride. It is insoluble in water, stable under normal temperatures and pressures.It can be used to produce 5-methoxy-3-(1-pyrrolidinylmethylene)-3H-indole by heating. This reaction will need solvent benzene with reaction time of 2 hours.
When you store 5-Methoxyindole-3-carboxaldehyde: Keep container closed when not in use. Store in a tightly closed container. Store in a cool, dry, well-ventilated area away from incompatible substances.
When you are using 5-Methoxyindole-3-carboxaldehyde, please be cautious about it as the following: This chemical may cause inflammation to the skin or other mucous membranes. It is irritating to eyes, respiratory system and skin. You must avoid contacting it with skin and eyes.
If you do 5-Methoxyindole-3-carboxaldehyde business or you just need some this chemical, you can choose suppliers in guidechem. Here are some suppliers of this compound in Guidechem.
1.Capot Chemical Co., Ltd.
Updatetime:Feb 13 2014
Purity:98% Min. Order:1/Kilogram Supply Ability:up to kgs Month/Kilogram
DetailDesc:175.18,C10H9NO2
Tel:86-571-85586718
Address:Joinhands Science Park, No.4028,Nanhuan Road
2.Hangzhou Dayangchem Co., Ltd.
5-Methoxyindole-3-aldehyde
Updatetime:Feb 13 2014
DetailDesc:5-Methoxyindole-3-aldehyde
Tel:86-571-88938639
Address:B/2601 Fuli Building, 328# WenEr Rd. Hangzhou City 310012 China
3.Shanghai Dell Chemical Co.Ltd
Updatetime:Feb 12 2014
Purity:NLT99% Min. Order:1/Kilogram Supply Ability:100 Year/Metric Ton
DetailDesc:Shanghai Dell Chemical Co.Ltd. is specialized in trading and developing active pharmaceutical ingredients, intermediates, API, and custom synthesis according to client’s requirements.
Tel:86-21-51950635
Address:Nianjiabang Rd, Pudong, Shanghai
4.Wuhan Fortuna Chemical Co., Ltd.
5-Methoxyindole-3-carboxaldehyde(CAS NO:10601-19-1)
Updatetime:Feb 11 2014
Min. Order:1/25/1000/Kilogram
DetailDesc:5-Methoxyindole-3-carboxaldehyde
Tel:0086-27-59207850
Address:A2705,Dong Yi Shi Qu,129# XinHua Road
5.Struchem Co Ltd
5-Methoxyindole-3-carboxaldehyde
Updatetime:Jan 14 2014
Purity:95%min Min. Order:1,5,25/Gram Supply Ability:kilograms Day/kilograms
Tel:86-512-63009836
Address:No. 2358 Chang'an Rd, Wujiang City, JiangSu Province, China 215200
Introduction:Based on BetaPharma(Shanghai) Co., Ltd, Struchem Co.,Ltd estabalished on 2010, the company's business scope covers special chemicals, agro-chemicals, APIs, natural ingredients Commodity Chemicals, intermediates & fragments and custom synthesis & manufacture.
6.Nanjing Norris-Pharm Technology Co., Ltd.
5-Methoxyindole-3-carboxaldehyde
Updatetime:Mar 29 2013
Purity:97% Min. Order:
DetailDesc:Pharmaceutical intermediates
Tel:86-25-66112881
Address:A1100 Cultural and Creative Industrial Park 5th Jiangning Road Nanjing 210006 China
Guidechem provide the most convenient conditions for the international buyers and let these leads benefit all the business people. If you need 5-Methoxyindole-3-carboxaldehyde or any other chemicals you can access to our Guidechem.
2014年2月13日星期四
How is the environmental fate of 2-Chlorobenzoic acid
2-Chlorobenzoic acid is a simple organic compound which can be used as a chemical building block. It is a kind of white crystals or powders withMolecular Formula: C7H5ClO2 andMolecular Weight: 156.57. It may be synthesized by the oxidation of 2-chlorotoluene with potassium permanganate.It can be synthesized by diazotization. It follows Sandmeyer reaction. It is irritant for the respiratory system and eyes.
The CAS Registry Number of 2-Chlorobenzoic acid is 118-91-2. It is soluble in hot water,stable, combustible and incompatible with strong bases, strong oxidizing agents. We should store it in a tightly closed container. Store in a cool, dry, well-ventilated area away from incompatible substances.
2-Chlorobenzoic acid is mainly used as dyes, pesticides, pharmaceutical intermediates, for the manufacture of chlorpromazine, anti-inflammatory drugs such as Hope for adhesive and coating preservatives and synthesis of organic materials. It can be used to dye and color film, and also can be used as a fungicide.
2-Chlorobenzoic acid is an anthropogenic compound which may be released to the environment as a fugitive emission during its production, formulation or use as a perservative and chemical intermediate and may be formed and released during chlorination of wastewater. If released to soil, 2-Chlorobenzoic acid is expected to biodegrade under both aerobic and anaerobic conditions, although there may be a lengthy lag periods. It is not expected to significantly volatilize from either moist or dry soil to the atmosphere.
2-Chlorobenzoic acid is expected to display moderate to high mobility in soil, and it will be found predominately in the dissociated form in moist soil under environmental conditions. If released to water, 2-Chlorobenzoic acid is expected to biodegrade under both aerobic and anaerobic conditions, although there may be a lengthy lag period.
2-Chlorobenzoic acid(CAS NO: 118-91-2) may undergo direct photolytic degradation in water. It is not expected to significantly volatilize from water to the atmosphere, nor is it expected to significantly adsorb to sediment and suspended organic matter. 2-Chlorobenzoic acid will be found predominately in the dissociated form in water under the typical pH's found in the environment.
If released to the atmosphere, 2-Chlorobenzoic acid may undergo a slow gas-phase reaction with photochemically produced hydroxyl radicals with an estimated half-life of 28.5 days. 2-Chlorobenzoic acid may also undergo atmospheric removal by wet deposition processes. Occupational exposure to 2-Chlorobenzoic acid may occur by dermal contact during its production, formulation or use. The general population may be exposed to 2-Chlorobenzoic acid by the ingestion of contaminated drinking water.
Guidechem provide the most convenient conditions for the international buyers and let these leads benefit all the business people. If you need 2-Chlorobenzoic acid or any other chemicals you can access to our Guidechem.
The CAS Registry Number of 2-Chlorobenzoic acid is 118-91-2. It is soluble in hot water,stable, combustible and incompatible with strong bases, strong oxidizing agents. We should store it in a tightly closed container. Store in a cool, dry, well-ventilated area away from incompatible substances.
2-Chlorobenzoic acid is mainly used as dyes, pesticides, pharmaceutical intermediates, for the manufacture of chlorpromazine, anti-inflammatory drugs such as Hope for adhesive and coating preservatives and synthesis of organic materials. It can be used to dye and color film, and also can be used as a fungicide.
2-Chlorobenzoic acid is an anthropogenic compound which may be released to the environment as a fugitive emission during its production, formulation or use as a perservative and chemical intermediate and may be formed and released during chlorination of wastewater. If released to soil, 2-Chlorobenzoic acid is expected to biodegrade under both aerobic and anaerobic conditions, although there may be a lengthy lag periods. It is not expected to significantly volatilize from either moist or dry soil to the atmosphere.
2-Chlorobenzoic acid is expected to display moderate to high mobility in soil, and it will be found predominately in the dissociated form in moist soil under environmental conditions. If released to water, 2-Chlorobenzoic acid is expected to biodegrade under both aerobic and anaerobic conditions, although there may be a lengthy lag period.
2-Chlorobenzoic acid(CAS NO: 118-91-2) may undergo direct photolytic degradation in water. It is not expected to significantly volatilize from water to the atmosphere, nor is it expected to significantly adsorb to sediment and suspended organic matter. 2-Chlorobenzoic acid will be found predominately in the dissociated form in water under the typical pH's found in the environment.
If released to the atmosphere, 2-Chlorobenzoic acid may undergo a slow gas-phase reaction with photochemically produced hydroxyl radicals with an estimated half-life of 28.5 days. 2-Chlorobenzoic acid may also undergo atmospheric removal by wet deposition processes. Occupational exposure to 2-Chlorobenzoic acid may occur by dermal contact during its production, formulation or use. The general population may be exposed to 2-Chlorobenzoic acid by the ingestion of contaminated drinking water.
Guidechem provide the most convenient conditions for the international buyers and let these leads benefit all the business people. If you need 2-Chlorobenzoic acid or any other chemicals you can access to our Guidechem.
2014年2月12日星期三
What is Dodecyl trimethyl ammonium chloride?
Dodecyl trimethyl ammonium chloride is a kind of white solids with Molecular Formula: C15H34NCl and Molecular Weight:263.89. It is soluble in water, stable and incompatible with strong oxidizing agents. Protect Dodecyl trimethyl ammonium chloride from moisture.
Store it in a tightly closed container. Store it in a cool, dry, well-ventilated area away from incompatible substances. Store protected from moisture. It is also know as DTAC, the EINECS is 203-927-0, and CAS Registry Number is 112-00-5.
Dodecyl trimethyl ammonium chloride groups are any of a group of ammonium salts in which organic radicals have been substituted for all four hydrogens of the original ammonium cation. They has a central nitrogen atom which is joined to four organic radicals and one acid radical.
The organic radicals may be alkyl, aryl, or aralkyl, and the nitrogen can be part of a ring system. They are prepared by treatment of an amine with an alkylating agent. They show a variety of physical, chemical, and biological properties and most compounds are soluble in water and strong electrolytes. Such compounds include
Dodecyl trimethyl ammonium chloride is widely used in commercial and consumer applications as disinfectants, fabric softeners, hair conditioners, and emulsifying agents. The massive production and utilization of Dodecyl trimethyl ammonium chloride has led to their extensive discharge into the environment, raising concerns globally.
Several studies have reported on potential risks and detrimental effects of this compound on the natural environment and public wastewater treatment plants. Biological treatment has been found to be an effective way to remove it and especially aerobic treatment processes can provide rapid biodegradation via a consortium of bacteria. Although extensive research has been conducted on the fate and effect of this compound, relatively little is known about their effect on aerobic biological treatment processes, especially on nitrification.
Dodecyl trimethyl ammonium chloride(CAS NO: 112-00-5) plays an important role in many industrial fields due to their versatile physico-chemical properties. Such widespread uses as disinfectants, fabric softening agents, foam depressants, and antistatic agents lead to massive discharge into the environment with its associated concerns .
Potential risks have been reported in many previous studies that repeated exposure to Dodecyl trimethyl ammonium chloride can induce microbial resistance against antibiotics in many pathogenic microorganisms. In addition, discharge of Dodecyl trimethyl ammonium chloride can disturb the purifying activities of natural aquatic systems or public wastewater treatment plants because of their toxicity to microbial life.
Guidechem provide the most convenient conditions for the international buyers and let these leads benefit all the business people. If you need Dodecyl trimethyl ammonium chloride or any other chemicals you can access to our Guidechem.
Store it in a tightly closed container. Store it in a cool, dry, well-ventilated area away from incompatible substances. Store protected from moisture. It is also know as DTAC, the EINECS is 203-927-0, and CAS Registry Number is 112-00-5.
Dodecyl trimethyl ammonium chloride groups are any of a group of ammonium salts in which organic radicals have been substituted for all four hydrogens of the original ammonium cation. They has a central nitrogen atom which is joined to four organic radicals and one acid radical.
The organic radicals may be alkyl, aryl, or aralkyl, and the nitrogen can be part of a ring system. They are prepared by treatment of an amine with an alkylating agent. They show a variety of physical, chemical, and biological properties and most compounds are soluble in water and strong electrolytes. Such compounds include
Dodecyl trimethyl ammonium chloride is widely used in commercial and consumer applications as disinfectants, fabric softeners, hair conditioners, and emulsifying agents. The massive production and utilization of Dodecyl trimethyl ammonium chloride has led to their extensive discharge into the environment, raising concerns globally.
Several studies have reported on potential risks and detrimental effects of this compound on the natural environment and public wastewater treatment plants. Biological treatment has been found to be an effective way to remove it and especially aerobic treatment processes can provide rapid biodegradation via a consortium of bacteria. Although extensive research has been conducted on the fate and effect of this compound, relatively little is known about their effect on aerobic biological treatment processes, especially on nitrification.
Dodecyl trimethyl ammonium chloride(CAS NO: 112-00-5) plays an important role in many industrial fields due to their versatile physico-chemical properties. Such widespread uses as disinfectants, fabric softening agents, foam depressants, and antistatic agents lead to massive discharge into the environment with its associated concerns .
Potential risks have been reported in many previous studies that repeated exposure to Dodecyl trimethyl ammonium chloride can induce microbial resistance against antibiotics in many pathogenic microorganisms. In addition, discharge of Dodecyl trimethyl ammonium chloride can disturb the purifying activities of natural aquatic systems or public wastewater treatment plants because of their toxicity to microbial life.
Guidechem provide the most convenient conditions for the international buyers and let these leads benefit all the business people. If you need Dodecyl trimethyl ammonium chloride or any other chemicals you can access to our Guidechem.
2014年2月11日星期二
Supply 2-(2H-benzotriazol-2-yl)-4,6-di-tert-pentylphenol
2-(2H-benzotriazol-2-yl)-4,6-di-tert-pentylphenol is a slightly yellowish powder,with synonyms of 2-(2-Hydroxy-3,5-dipenryl-phenyl)benzotriazole;2-(2H-benzotriazol-2-yl)-4,6-bis(1,1-dimethylpropyl)-phenol; Molecular Formula is C22H29N3O, Molecular Weight is 351.48516 and CAS Registry Number is 25973-55-1.
Our Guidechem provides all users with chemical dictionary, chemical selling leads, chemical buying requests and chemical news over the world. Easy find and direct contact global chemical suppliers, especially from China. Here are some suppliers information of 2-(2H-benzotriazol-2-yl)-4,6-di-tert-pentylphenol in guidechem, I hope you can do you business better on our Guidechem.
1.AOPHARM
Updatetime:Feb 11 2014
Purity:99% Min. Order:10/Gram
DetailDesc:2-(2H-Benzotriazol-2-yl)-4,6-ditertpentylphenol CAS 25973-55-1
Tel:86-311-66600578
Address:C-2103 Wonder Business Square, 15 Yuhua West Rd
2.Hangzhou Dayangchem Co., Ltd.
Updatetime:Feb 11 2014
DetailDesc:2-(2'-Hydroxy-3',5'-di-tertamylphenyl)benzotriale (UV-328)
Tel:86-571-88938639
Address:B/2601 Fuli Building, 328# WenEr Rd. Hangzhou City 310012 China
3.HUTONG GLOBAL CO.,LTD
Updatetime:Feb 10 2014
DetailDesc: Ultraviolet Absorbent UV-328 CAS Number: 25973-55-1 Molecular formula: C22H29N3O Apprearance: Light Yellow Powder Content:99%min Packing:25kgs/drum
Tel:86-22-59853797
Address:chagugang,wuqing district,Tianjin,China
4.run-biotech Co., Ltd.
Updatetime:Feb 08 2014
DetailDesc:Phenol, 2-(2H-benzotriazol-2-yl)-4,6-bis(1,1-dimethylpropyl)-
Tel:86-21-61900721
Address:Room 3-201, No.787, Kangqiao Road, Pudong New District, Shanghai, China
5.Atomax Chemicals Co.,Ltd
Updatetime:Dec 11 2013
Purity:95+% Supply Ability:g/kg
DetailDesc:Atomax Chemicals Co.,Ltd a leading global supplier and manufacturer of chiral chemicals, amino acids, aromatic and pyridine halogens, natural extracts and pharmaceutical raw materials. we are a registered chemicals provider for most giant pharmaceutical company like Merck, Pfizer, Novartis, Roche, Astrazeneca, Sanofi-Aventis, etc.
Tel:86-755-33239182
Address:Huiji302 Hutingju Sanwei Xixiang SHENZHEN 518126, China
6.Shanghai UCHEM Inc.
Updatetime:Feb 07 2014
DetailDesc:2-(2h-benzotriazol-2-yl)-4,6-bis(1,1-dimethylpropyl)-pheno
Tel:086-021-61555264
Address:4th Floor,Build A,500Jianyun Road,Zhoupu,Pudong,Shanghai
7.Angene International Limited
Updatetime:Jan 08 2014
DetailDesc:You can find 2-(3,5-Di-Tert-Amyl-2-Hydroxyphenyl)Benzotriazole with most competitive price and high quality here. Welcome to inquire for stock confirming.
Tel:852-852-81916999
Address:4/F Silvercord Center Tower 1, 30 Canton Rd,KL,Hong Kong
8.Lotuschem
2-(2H-benzotriazol-2-yl)-4,6-di-tert-pentylphenol
Updatetime:Jul 31 2013
Tel:852-29738324
Address:Rm. 907. JCD116 Wing Tuck Commercial Centre, 177-183 Wing Lok Street, Hong Kong
9.Tianjin Bairun International Trade Co.,Ltd
2-(2H-benzotriazol-2-yl)-4,6-di-tert-pentylphenol
Updatetime:Nov 27 2012
Purity:99%
DetailDesc: Ultraviolet Absorbent UV-328/2-(2H-benzotriazol-z-yl)-4,6-di-tert-pentylphenol Ultraviolet Absorber UV - 328 Chemical Name 2-(2H-benzotriazol-z-yl)-4,6-di-tert-pentylphenol Chemical Formula C 22 H 29 N 3 O CAS NO. 3896-11-5 Product Intro This product is a benzotriazole ultraviolet absorber. It is one of the fine varieties of light stabil...
Tel:86-22-60889259
Address:A407-83,Building 1st Tongda Square,Tianjin Port Fr
10.Tianjin Puck Rice Chemicals Co., Ltd.
2-(2H-benzotriazol-2-yl)-4,6-di-tert-pentylphenol
Updatetime:Oct 13 2012
DetailDesc: Quick Details CAS No.: 25973-55-1 Melting Point: 80-83 C Boiling Point: 469.1 C at 760 mmHg Flash Point: 237.5 C Risk Codes: 36/37/38 Safety: 26-36 Assay: ≥ 99% Exterior: light yellow powder Package: cardboard drum inner lining plastic bag, each drum 25kg net weight Storage: UV-328 is nontoxic, uninflammable, unexplosive and incorrosive, has good storage stability.
Tel:022-58054572
Address:Weidi Road
Guidechem provide the most convenient conditions for the international buyers and let these leads benefit all the business people. If you need 2-(2H-benzotriazol-2-yl)-4,6-di-tert-pentylphenol or any other chemicals you can access to our Guidechem.
Our Guidechem provides all users with chemical dictionary, chemical selling leads, chemical buying requests and chemical news over the world. Easy find and direct contact global chemical suppliers, especially from China. Here are some suppliers information of 2-(2H-benzotriazol-2-yl)-4,6-di-tert-pentylphenol in guidechem, I hope you can do you business better on our Guidechem.
1.AOPHARM
Updatetime:Feb 11 2014
Purity:99% Min. Order:10/Gram
DetailDesc:2-(2H-Benzotriazol-2-yl)-4,6-ditertpentylphenol CAS 25973-55-1
Tel:86-311-66600578
Address:C-2103 Wonder Business Square, 15 Yuhua West Rd
2.Hangzhou Dayangchem Co., Ltd.
Updatetime:Feb 11 2014
DetailDesc:2-(2'-Hydroxy-3',5'-di-tertamylphenyl)benzotriale (UV-328)
Tel:86-571-88938639
Address:B/2601 Fuli Building, 328# WenEr Rd. Hangzhou City 310012 China
3.HUTONG GLOBAL CO.,LTD
Updatetime:Feb 10 2014
DetailDesc: Ultraviolet Absorbent UV-328 CAS Number: 25973-55-1 Molecular formula: C22H29N3O Apprearance: Light Yellow Powder Content:99%min Packing:25kgs/drum
Tel:86-22-59853797
Address:chagugang,wuqing district,Tianjin,China
4.run-biotech Co., Ltd.
Updatetime:Feb 08 2014
DetailDesc:Phenol, 2-(2H-benzotriazol-2-yl)-4,6-bis(1,1-dimethylpropyl)-
Tel:86-21-61900721
Address:Room 3-201, No.787, Kangqiao Road, Pudong New District, Shanghai, China
5.Atomax Chemicals Co.,Ltd
Updatetime:Dec 11 2013
Purity:95+% Supply Ability:g/kg
DetailDesc:Atomax Chemicals Co.,Ltd a leading global supplier and manufacturer of chiral chemicals, amino acids, aromatic and pyridine halogens, natural extracts and pharmaceutical raw materials. we are a registered chemicals provider for most giant pharmaceutical company like Merck, Pfizer, Novartis, Roche, Astrazeneca, Sanofi-Aventis, etc.
Tel:86-755-33239182
Address:Huiji302 Hutingju Sanwei Xixiang SHENZHEN 518126, China
6.Shanghai UCHEM Inc.
Updatetime:Feb 07 2014
DetailDesc:2-(2h-benzotriazol-2-yl)-4,6-bis(1,1-dimethylpropyl)-pheno
Tel:086-021-61555264
Address:4th Floor,Build A,500Jianyun Road,Zhoupu,Pudong,Shanghai
7.Angene International Limited
Updatetime:Jan 08 2014
DetailDesc:You can find 2-(3,5-Di-Tert-Amyl-2-Hydroxyphenyl)Benzotriazole with most competitive price and high quality here. Welcome to inquire for stock confirming.
Tel:852-852-81916999
Address:4/F Silvercord Center Tower 1, 30 Canton Rd,KL,Hong Kong
8.Lotuschem
2-(2H-benzotriazol-2-yl)-4,6-di-tert-pentylphenol
Updatetime:Jul 31 2013
Tel:852-29738324
Address:Rm. 907. JCD116 Wing Tuck Commercial Centre, 177-183 Wing Lok Street, Hong Kong
9.Tianjin Bairun International Trade Co.,Ltd
2-(2H-benzotriazol-2-yl)-4,6-di-tert-pentylphenol
Updatetime:Nov 27 2012
Purity:99%
DetailDesc: Ultraviolet Absorbent UV-328/2-(2H-benzotriazol-z-yl)-4,6-di-tert-pentylphenol Ultraviolet Absorber UV - 328 Chemical Name 2-(2H-benzotriazol-z-yl)-4,6-di-tert-pentylphenol Chemical Formula C 22 H 29 N 3 O CAS NO. 3896-11-5 Product Intro This product is a benzotriazole ultraviolet absorber. It is one of the fine varieties of light stabil...
Tel:86-22-60889259
Address:A407-83,Building 1st Tongda Square,Tianjin Port Fr
10.Tianjin Puck Rice Chemicals Co., Ltd.
2-(2H-benzotriazol-2-yl)-4,6-di-tert-pentylphenol
Updatetime:Oct 13 2012
DetailDesc: Quick Details CAS No.: 25973-55-1 Melting Point: 80-83 C Boiling Point: 469.1 C at 760 mmHg Flash Point: 237.5 C Risk Codes: 36/37/38 Safety: 26-36 Assay: ≥ 99% Exterior: light yellow powder Package: cardboard drum inner lining plastic bag, each drum 25kg net weight Storage: UV-328 is nontoxic, uninflammable, unexplosive and incorrosive, has good storage stability.
Tel:022-58054572
Address:Weidi Road
Guidechem provide the most convenient conditions for the international buyers and let these leads benefit all the business people. If you need 2-(2H-benzotriazol-2-yl)-4,6-di-tert-pentylphenol or any other chemicals you can access to our Guidechem.
2014年2月10日星期一
What do you know about Ferric sulfate?
Ferric sulfate, is the chemical compound with the formula Fe2(SO4)3, the sulfate of trivalent iron. Usually yellow, it is a rhombic crystalline salt and soluble in water at room temperature. It is used in dyeing as a mordant, and as a coagulant for industrial wastes. It is also used in pigments, and in pickling baths for aluminum and steel. Medically it is used as an astringent and styptic.
The enneahydrate, Fe2(SO4)3·9H2O, is a deliquescent rhombic crystalline salt that occurs in nature as the mineral coquimbite. It is used as a mordant in dyeing, as a coagulant for industrial wastes, in pickling baths for aluminum and steel, and in pigments. The CAS Registry Number is 10028-22-5.
Ferric sulfate is written out as Fe2(SO4)3, which means it contains a total of three naturally occurring chemical elements. Ferric sulphate is supplied as a reddish brown liquid manufactured from mined magnetic iron ore, virgin sulfuric acid, liquid oxygen, and water. Before use in its myriad industrial applications, the solution is prepared through oxidation, converting the ferrous iron within its composition into ferric iron. Stable iron concentrations in the resulting compound run up to 14%. The resulting solution can also be converted into granular form.
Ferric sulfate and jarosite have been detected by the two martian rovers Spirit and Opportunity. These substances are indicative of strongly oxidizing conditions prevailing at the surface of Mars. In May 2009, the Spirit rover became stuck when it drove over a patch of soft ferric sulfate that had been hidden under a veneer of normal-looking soil.
Because iron sulfate has very little cohesion, the rover's wheels could not gain sufficient traction to pull the body of the rover out of the iron sulfate patch. Multiple techniques were attempted to extricate the rover, but the wheels eventually sunk so deeply into the iron sulfate that the body of the rover came to rest on the martian surface, preventing the wheels from exerting any force on the material below them. As the JPL team failed to recover the mobility of Spirit, it signified the end of the journey for the rover.
The main applications of Ferric sulfate in the industrial sector include dyeing, coagulation for pigments or industrial wastes, potable drinking water production, municipal and industrial wastewater treatment, and sludge conditioning. It works to prevent odor by eliminating hydrogen sulfide. Ferric sulfate works in a wide pH range too and decomposes at a high temperature. In other non-industrial sectors, ferric sulphate is also used to remove natural organic matter in water, such as bacteria, arsenic, and heavy metals.
Guidechem provide the most convenient conditions for the international buyers and let these leads benefit all the business people. If you need Ferric sulfate or any other chemicals you can access to our Guidechem.
The enneahydrate, Fe2(SO4)3·9H2O, is a deliquescent rhombic crystalline salt that occurs in nature as the mineral coquimbite. It is used as a mordant in dyeing, as a coagulant for industrial wastes, in pickling baths for aluminum and steel, and in pigments. The CAS Registry Number is 10028-22-5.
Ferric sulfate is written out as Fe2(SO4)3, which means it contains a total of three naturally occurring chemical elements. Ferric sulphate is supplied as a reddish brown liquid manufactured from mined magnetic iron ore, virgin sulfuric acid, liquid oxygen, and water. Before use in its myriad industrial applications, the solution is prepared through oxidation, converting the ferrous iron within its composition into ferric iron. Stable iron concentrations in the resulting compound run up to 14%. The resulting solution can also be converted into granular form.
Ferric sulfate and jarosite have been detected by the two martian rovers Spirit and Opportunity. These substances are indicative of strongly oxidizing conditions prevailing at the surface of Mars. In May 2009, the Spirit rover became stuck when it drove over a patch of soft ferric sulfate that had been hidden under a veneer of normal-looking soil.
Because iron sulfate has very little cohesion, the rover's wheels could not gain sufficient traction to pull the body of the rover out of the iron sulfate patch. Multiple techniques were attempted to extricate the rover, but the wheels eventually sunk so deeply into the iron sulfate that the body of the rover came to rest on the martian surface, preventing the wheels from exerting any force on the material below them. As the JPL team failed to recover the mobility of Spirit, it signified the end of the journey for the rover.
The main applications of Ferric sulfate in the industrial sector include dyeing, coagulation for pigments or industrial wastes, potable drinking water production, municipal and industrial wastewater treatment, and sludge conditioning. It works to prevent odor by eliminating hydrogen sulfide. Ferric sulfate works in a wide pH range too and decomposes at a high temperature. In other non-industrial sectors, ferric sulphate is also used to remove natural organic matter in water, such as bacteria, arsenic, and heavy metals.
Guidechem provide the most convenient conditions for the international buyers and let these leads benefit all the business people. If you need Ferric sulfate or any other chemicals you can access to our Guidechem.
The main usages of Glyoxylic acid
Glyoxylic acid or oxoacetic acid is an organic compound. Together with acetic acid, glycolic acid, and oxalic acid, glyoxylic acid is one of the C2 carboxylic acids. It is a colourless solid that occurs naturally and is useful industrially. The Molecular Formula is C2H2O3, Molecular Weight is 74.04, and CAS Registry Number is 298-12-4.
Glyoxylic acid is a strong organic acid and a highly reactive chemical intermediate having two functional groups: the aldehyde group and the carboxylic acid group. Because of its bi-functionality is a versatile reagent in organic and fine chemicals syntheses. It is formed by organic oxidation of glyoxal with hot nitric acid, the main side product being oxalic acid. Ozonolysis of maleic acid is also effective.
The conjugate base of gloxylic acid is known as glyoxylate and is the form that the compound exists in solution at neutral pH. Glyoxylate is an intermediate of the glyoxylate cycle, which enables organisms, such as bacteria, fungi, and plants to convert fatty acids into carbohydrates. Glyoxylate is the byproduct of the amidation process in biosynthesis of several amidated peptides.Historically Glyoxylic acid (CAS NO:298-12-4) was prepared from oxalic acid electrosynthetically.
Glyoxylic acid as an alternative reducing agent for electroless copper plating was investigated. Plating rates and bath stability were superior to that of the formaldehyde bath under standard conditions. Glyoxylate ions in the plating bath have no vapor pressure and showed good reducing power in the electroless copper plating. Therefore, glyoxylic acid can replace formaldehyde, and eliminate health and environmental problems resulting from generation of the fumes.
The glyoxylic acid condensation reaction is commonly used for visual detection of biogenic amines in histological sections. This is the sucrose-phosphate-glyoxylic acid histofluorescence method for the visualization of monoamines in tissues where the fluorescence is analyzed by fluorescence microscopy. It is used for counterstaining tissues.
The glyoxilic acid derivatives were discoverd as a new class of Oomycete fungicides. The Glyoxylic acid derivatives exhibit specific activity against oomycetes, including dwony mildew on grapes and late blight on potatoes an tomatoes. They are active against Oomycetes in soil such as Phytophthora in tabacoo and citrus. They exhibit protective, curative, eradicative and antisporulant activity. The glyoxilic acid can be synthesized wih a simple synthetic approach where in the second step the glycolic acid ester is needed.
The other usages of Glyoxylic acid, such as :Material for water purificant, used in the preservation of food.Crosslinking agent of polymerization and plating additive.Starting material for the synthesis of iron chelates. Intermediate of varnish material, dyes.
Want to learn more information about Glyoxylic acid, you can access to our Guidechem. Guidechem chemical B2B network provides information on china and global chemical market quotation and relative chemical Information.
Glyoxylic acid is a strong organic acid and a highly reactive chemical intermediate having two functional groups: the aldehyde group and the carboxylic acid group. Because of its bi-functionality is a versatile reagent in organic and fine chemicals syntheses. It is formed by organic oxidation of glyoxal with hot nitric acid, the main side product being oxalic acid. Ozonolysis of maleic acid is also effective.
The conjugate base of gloxylic acid is known as glyoxylate and is the form that the compound exists in solution at neutral pH. Glyoxylate is an intermediate of the glyoxylate cycle, which enables organisms, such as bacteria, fungi, and plants to convert fatty acids into carbohydrates. Glyoxylate is the byproduct of the amidation process in biosynthesis of several amidated peptides.Historically Glyoxylic acid (CAS NO:298-12-4) was prepared from oxalic acid electrosynthetically.
Glyoxylic acid as an alternative reducing agent for electroless copper plating was investigated. Plating rates and bath stability were superior to that of the formaldehyde bath under standard conditions. Glyoxylate ions in the plating bath have no vapor pressure and showed good reducing power in the electroless copper plating. Therefore, glyoxylic acid can replace formaldehyde, and eliminate health and environmental problems resulting from generation of the fumes.
The glyoxylic acid condensation reaction is commonly used for visual detection of biogenic amines in histological sections. This is the sucrose-phosphate-glyoxylic acid histofluorescence method for the visualization of monoamines in tissues where the fluorescence is analyzed by fluorescence microscopy. It is used for counterstaining tissues.
The glyoxilic acid derivatives were discoverd as a new class of Oomycete fungicides. The Glyoxylic acid derivatives exhibit specific activity against oomycetes, including dwony mildew on grapes and late blight on potatoes an tomatoes. They are active against Oomycetes in soil such as Phytophthora in tabacoo and citrus. They exhibit protective, curative, eradicative and antisporulant activity. The glyoxilic acid can be synthesized wih a simple synthetic approach where in the second step the glycolic acid ester is needed.
The other usages of Glyoxylic acid, such as :Material for water purificant, used in the preservation of food.Crosslinking agent of polymerization and plating additive.Starting material for the synthesis of iron chelates. Intermediate of varnish material, dyes.
Want to learn more information about Glyoxylic acid, you can access to our Guidechem. Guidechem chemical B2B network provides information on china and global chemical market quotation and relative chemical Information.
2014年2月9日星期日
Properties and suppliers of BOC-D-Phenylalanine
BOC-D-Phenylalanine is a kind of white to off-white crystalline powder with Molecular Formula: C14H19NO4 and Molecular Weight:265.31. It has these properties: Density:1.16 g/cm3,Boiling Point:426.6 C at 760 mmHg, Melting Point: 85-88 C, Flash Point: 211.8 C,Transport Information: OTH, Hazard Symbols:Not regulated UN NO, CAS Registry Number is 18942-49-9.
BOC-D-Phenylalanine is an essential amino acid obtained in the levo form by hydrolysis of proteins. Branched amino-acids with tryptophan and phenylalanine contribute to the structure of protein by the tendency of its side chain composed only of carbon and hydrogen to participate in hydrophobic interactions which determines the tertiary structure of the peptide chain.
In addition to its role in protein synthesis, BOC-D-Phenylalanine (CAS NO:18942-49-9) is the metabolic precursor of the non-essential amino acid tyrosine which makes hormones, such as norepinephrine and epinephrine in the normal body. The prefix nor- describes normal structure which has no branched chain of carbon atoms. But in case of norepinephrine, it has one less methylene group than its homologue, epinephrine.
BOC-D-Phenylalanine is also converted to phenylethylamine occuring naturally in the brain to elevate mood. It is used to treat depression, inflammation, chronic pain, Parkinson's disease. BOC-D-Phenylalanine is a key intermediate to make aspartame. N-alpha-t-BOC-D-phenylalanine is used in biological research of peptidomimetics. It is used to prepare unnatural and unusual amino acids and amino acid analogs as well as to modify peptides.
Here are some suppliers of BOC-D-Phenylalanine in GUIDECHEM. Guidechem chemical B2B network provides information on china and global chemical market quotation and relative chemical Information. Guidechem Chemical Network providing the most complete information of the chemical industry.
1.Hangzhou Dayangchem Co., Ltd.
Updatetime:Feb 08 2014
DetailDesc:BOC-D-Phenylalanine
Tel:86-571-88938639
Address:B/2601 Fuli Building, 328# WenEr Rd. Hangzhou City 310012 China
2.Capot Chemical Co., Ltd.
Updatetime:Jan 27 2014
Purity:98% Min. Order:1/Kilogram Supply Ability:up to kgs Month/Kilogram
DetailDesc:265.31,C14H19NO4
Tel:86-571-85586718
Address:Joinhands Science Park, No.4028,Nanhuan Road,
3.Atomax Chemicals Co.,Ltd
Boc-D-phenylalanine
Updatetime:Dec 11 2013
Purity:95%+ Min. Order:mg/g/Gram Supply Ability:kg/T Month/Gram
DetailDesc:We are a leading global supplier and manufacturer of chiral chemicals, amino acids, aromatic and pyridine halogens, natural extracts and pharmaceutical raw materials. Those chemicals are widely used in the pharmaceutical and fine chemical industries and in research laboratories.
Tel:86-755-33239182
Address:Huiji302 Hutingju Sanwei Xixiang SHENZHEN 518126, China
4.Jinan Haohua Industry Co., Ltd.
BOC-D-Phenylalanine
Updatetime:Feb 08 2014
Purity:99 Min. Order:1/Kilogram Supply Ability:100 Year/Metric Ton
DetailDesc:N-(tert-Butoxycarbonyl)-D-phenylalanine
Tel:0086-531-58773055
Address:No.59 Gongye South RD
5.Shanghai UCHEM Inc.
Boc-D-Phenylalanine
Updatetime:Feb 07 2014
DetailDesc:Boc-D-Phenylalanine
Tel:086-021-61555264
Address:4th Floor,Build A,500Jianyun Road,Zhoupu,Pudong,Shanghai
Want to learn more information about Boc-D-Phenylalanine, you can access the guidechem.com. Guidechem is just a place for you to look for some chemicals.
BOC-D-Phenylalanine is an essential amino acid obtained in the levo form by hydrolysis of proteins. Branched amino-acids with tryptophan and phenylalanine contribute to the structure of protein by the tendency of its side chain composed only of carbon and hydrogen to participate in hydrophobic interactions which determines the tertiary structure of the peptide chain.
In addition to its role in protein synthesis, BOC-D-Phenylalanine (CAS NO:18942-49-9) is the metabolic precursor of the non-essential amino acid tyrosine which makes hormones, such as norepinephrine and epinephrine in the normal body. The prefix nor- describes normal structure which has no branched chain of carbon atoms. But in case of norepinephrine, it has one less methylene group than its homologue, epinephrine.
BOC-D-Phenylalanine is also converted to phenylethylamine occuring naturally in the brain to elevate mood. It is used to treat depression, inflammation, chronic pain, Parkinson's disease. BOC-D-Phenylalanine is a key intermediate to make aspartame. N-alpha-t-BOC-D-phenylalanine is used in biological research of peptidomimetics. It is used to prepare unnatural and unusual amino acids and amino acid analogs as well as to modify peptides.
Here are some suppliers of BOC-D-Phenylalanine in GUIDECHEM. Guidechem chemical B2B network provides information on china and global chemical market quotation and relative chemical Information. Guidechem Chemical Network providing the most complete information of the chemical industry.
1.Hangzhou Dayangchem Co., Ltd.
Updatetime:Feb 08 2014
DetailDesc:BOC-D-Phenylalanine
Tel:86-571-88938639
Address:B/2601 Fuli Building, 328# WenEr Rd. Hangzhou City 310012 China
2.Capot Chemical Co., Ltd.
Updatetime:Jan 27 2014
Purity:98% Min. Order:1/Kilogram Supply Ability:up to kgs Month/Kilogram
DetailDesc:265.31,C14H19NO4
Tel:86-571-85586718
Address:Joinhands Science Park, No.4028,Nanhuan Road,
3.Atomax Chemicals Co.,Ltd
Boc-D-phenylalanine
Updatetime:Dec 11 2013
Purity:95%+ Min. Order:mg/g/Gram Supply Ability:kg/T Month/Gram
DetailDesc:We are a leading global supplier and manufacturer of chiral chemicals, amino acids, aromatic and pyridine halogens, natural extracts and pharmaceutical raw materials. Those chemicals are widely used in the pharmaceutical and fine chemical industries and in research laboratories.
Tel:86-755-33239182
Address:Huiji302 Hutingju Sanwei Xixiang SHENZHEN 518126, China
4.Jinan Haohua Industry Co., Ltd.
BOC-D-Phenylalanine
Updatetime:Feb 08 2014
Purity:99 Min. Order:1/Kilogram Supply Ability:100 Year/Metric Ton
DetailDesc:N-(tert-Butoxycarbonyl)-D-phenylalanine
Tel:0086-531-58773055
Address:No.59 Gongye South RD
5.Shanghai UCHEM Inc.
Boc-D-Phenylalanine
Updatetime:Feb 07 2014
DetailDesc:Boc-D-Phenylalanine
Tel:086-021-61555264
Address:4th Floor,Build A,500Jianyun Road,Zhoupu,Pudong,Shanghai
Want to learn more information about Boc-D-Phenylalanine, you can access the guidechem.com. Guidechem is just a place for you to look for some chemicals.
订阅：
博文 (Atom)