CAS 75-05-8 Acetonitrile is a highly flammable, colorless liquid that poses a serious fire hazard. It ignites easily from heat, sparks, or flames and produces toxic hydrogen cyanide fumes when heated.
Is acetonitrile flammable or combustible?
Acetonitrile (CAS 75-05-8) is classified as a flammable liquid, not just combustible. It presents real fire and explosion risks under normal storage and handling conditions, so strict safety precautions are required.
What are the safety hazards of acetonitrile?
1.Hazard Identification
- Flammability: The liquid and vapor are highly flammable (flash point: approximately 2 °C – 6 °C). Vapors are heavier than air, may spread to an ignition source, and cause flashback.
- Acute Toxicity: Harmful if swallowed, in contact with skin, or inhaled.
- Health Effects: Causes severe eye irritation. Exposure may result in headache, nausea, vomiting, dizziness, abdominal pain; severe cases may involve convulsions or coma.
- Delayed Toxicity: Symptoms of cyanide poisoning (due to metabolic processes) may be delayed by 2–12 hours.
- Reproductive Hazard: May cause damage to reproductive organs or reproductive function.
2. Handling Precautions
- Ventilation: Use only in a well-ventilated area or under a chemical fume hood.
- Ignition Sources: Keep away from heat, sparks, open flames, and hot surfaces. Smoking is strictly prohibited.
- Static Electricity: Take measures to prevent static discharge. Ground and bond containers during transfer operations.
- Equipment: Use non-sparking tools and explosion-proof electrical, ventilation, and lighting equipment.
- Hygiene: Wash hands and exposed skin thoroughly after handling. Do not eat, drink, or smoke while using this product.
- Contact Prevention: Avoid contact with skin, eyes, and clothing.
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