2013年7月30日星期二

Some questions and answers about Acetone (part one)

1. What are the most important things to know about acetone in an emergency?
Emergency Overview: Clear colourless volatile liquid. Sweet odour. HIGHLY FLAMMABLE LIQUID AND VAPOUR. Distant ignition and flashback are possible. May cause drowsiness and dizziness. IRRITANT. Causes moderate or severe eye irritation.
Main Routes of Exposure: Inhalation, Skin contact, Eye contact:
Inhalation: Can irritate the nose and throat. At high concentrations: can harm the nervous system. Symptoms may include headache, nausea, dizziness, drowsiness and confusion. A severe exposure can cause unconsciousness.
Skin Contact: May cause mild irritation. Can be absorbed through the skin, but harmful effects are not expected.
Eye Contact: EYE IRRITANT. Causes moderate to severe irritation. Symptoms include sore, red eyes, and tearing. The vapour also irritates the eyes.
Ingestion: Not harmful. If large amounts are ingested: Can cause effects as described for inhalation.
Effects of Long-Term (Chronic) Exposure: Can cause dry, red, cracked skin (dermatitis) following skin contact. May harm the nervous system. Conclusions cannot be drawn from the limited studies available.
Carcinogenicity: Not known to cause cancer.
International Agency for Research on Cancer (IARC): Not specifically evaluated.
American Conference for Governmental Industrial Hygienists (ACGIH): A4 - Not classifiable as a human carcinogen.
Teratogenicity / Embryotoxicity: Not known to harm the unborn child.
Reproductive Toxicity: Not known to be a reproductive hazard.
Mutagenicity: Not known to be a mutagen.

2. What are first aid measures for acetone?
Inhalation: Take precautions to prevent a fire (e.g. remove sources of ignition). Move victim to fresh air. Call a Poison Centre or doctor if the victim feels unwell.
Skin Contact: Take off contaminated clothing, shoes and leather goods (e.g. watchbands, belts). Flush with lukewarm, gently flowing water for 5 minutes. If irritation or pain persists, see a doctor. Thoroughly clean clothing, shoes and leather goods before reuse or dispose of safely.
Eye Contact: Immediately flush the contaminated eye(s) with lukewarm, gently flowing water for 15-20 minutes, while holding the eyelid(s) open. If a contact lens is present, DO NOT delay flushing or attempt to remove the lens. Take care not to rinse contaminated water into the unaffected eye or onto the face. If irritation or pain persists, see a doctor.
Ingestion: Have victim rinse mouth with water. Call a Poison Centre or doctor if the victim feels unwell.
First Aid Comments: All first aid procedures should be periodically reviewed by a doctor familiar with the chemical and its conditions of use in the workplace.
What handling and storage practices should be used when working with acetone?

3. What handling and storage practices should be used when working with acetone?
Handling: Eliminate heat and ignition sources such as sparks, open flames, hot surfaces and static discharge. Post "No Smoking" signs. Electrically bond and ground equipment. Ground clips must contact bare metal. Do not weld, cut or perform hot work on empty container until all traces of product have been removed.
Storage: Store in an area that is: cool, well-ventilated, out of direct sunlight and away from heat and ignition sources. Electrically bond and ground containers. Ground clips must contact bare metal. Install pressure and vacuum-relief venting in all drums. Equip storage tank vents with a flame arrestor.

In this article, I just give you three questions and answers about Acetone, I hope it is helpful for you. In the next passage, I will show you the others.


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