GB No. 31037
CAS No. 107-31-3
Molecular Formula C₂H₄O₂; HCOOCH₃
molecular 60.05

colorless liquid, aromatic odor; vapor pressure 53.32kPa/16 ° C flash point : -32 ° C -99.8 ° C melting point; boiling point of 32.0 ° C; solubility : soluble in water, alcohol, ether and methanol; density : relative density (water = 10.98); the relative density (Air = 1) 2.07; Stability : stability; risk Marker 7 (low flash point flammable liquids; the main purposes : for Organic Synthesis, acetate fibers solvents, such as analysis of reagent

2. The impact on the environment :
a health hazard

pathways : inhaled, ingested, percutaneous absorption.
health hazards : a narcotic goods and stimulating effect. Contact concentration of the materials, notably the stimulus; Repeated exposure can induce cramps or even death.

two, toxicology information and environmental behavior

acute toxicity : LD₅₀1622mg/kg (rabbit oral)
subacute and chronic toxicity : cat inhalation 2300mg/m3, 25 hours, 30 minutes to an hour after the movement disorders, lateral 2 ~ 3 hours deaths (pulmonary edema); guinea pigs inhaled 25g/m3 × 3 ~ 4 hours of death; the person I 800mg/kg, minimum lethal dose.

hazardous characteristics : extremely flammable vapor and air can form explosive mixtures. Case open flame, heat or contact with oxidants, combustion caused a risk of explosion. In the scene, heating containers risk of explosion. Its vapor is heavier than air, will spread to the lower Department of considerable local and met the fire will generate a return to burning.
combustion (decomposition) products : carbon monoxide, carbon dioxide.

3. Emergency Monitoring Methods :

4. Laboratory monitoring methods :
direct-injection gas chromatography (WS/T166-1999, air operations)
air : activated carbon samples collected and then analyzed by gas chromatography GC
light "Manual of Analytical Chemistry" (fourth volumes, chromatography analysis), the chemical industry publishers

5. Environmental standards :
former Soviet air workshop harmful substances maximum allowable concentration 250mg/m3
air olfactory threshold concentration of 66 ~ 72ppm

6. Emergency treatment and disposal methods :
a leakage contingency

rapid withdrawal from air leakage personnel to a safe area, and isolation and strict restrictions on access. Cut off the fire source. Recommended emergency personnel wearing respirators-positive pressure self-sufficiency, wearing fire protective clothing. As far as possible, cut off the source of leakage. Preventing access to sewers, flood discharge trench so restrictive space. A small leak : sand or other materials Unburning adsorption or absorption. We could also use a lot of water rinse, diluted Add Water Wastewater System. Large leak : to build a causeway or trenching asylum; Foam coverage, lower vapor disasters. Ex pump used to transfer tankers or exclusive collector, recycling or shipped to the disposal of waste disposal sites.
waste disposal method : incineration.

two protective measures

respiratory protection : concentration in air overweight, they should wear self-absorption filter respirators (half-mask). Emergency rescue or evacuation, it is recommended to wear air respirators.
eye protection : Wear protective chemical safety glasses.
physical protection : antistatic wear uniforms.
hand protection : Wear latex gloves.
other : no smoking scene work. Work to complete, take a shower. Pay attention to personal hygiene.

three, and emergency measures

contact with the skin : stripped of contaminated clothing, use soap and water thoroughly washed skin.
eye contact : Did eyelid, mobile or saline irrigation water. Medical treatment.
Inhalation : rapidly from the scene to fresh air. To keep the airway patency. If breathing is difficult, give oxygen. If breathing stop immediately mouth. Medical treatment. Fresh into
: warm water to drink enough, the symptoms and to seek medical treatment.

fire fighting methods : as far as possible to move containers from the scene empty Department. Water cooling containers to keep the fire until the end of fire. At the scene of containers, if any, change from the pressure relief safety devices have voices must evacuate immediately. Extinguishing agents : anti-insoluble foam, powder, CO2, sand. Water fire invalid.