CAS No. 32159, Molecular Formula C2H3N
75-05-8; CH3< / SUB>CN
colorless liquid, irritating odor; vapor pressure 13.33kPa/27 ° C flashpoint 2 ° C; -45.7 ° C melting point; Boiling Point 81 .1 ° C; solubility : Compatibility with water, the majority of alcohol-soluble organic solvent; density : relative density (water = 1) 0.79; the relative density (Air = 1) 1.42; Stability : stability; risk Marker 7 (flammable liquids) , 40 (drugs); the main purposes : Vitamin B1 system for such drugs, and spices, such as fatty acid extraction
2. The impact on the environment :
a health hazard
pathways : inhaled, ingested, percutaneous absorption.
health hazards : acetonitrile incidence of acute poisoning slower than hydrocyanic acid, which is a few hours incubation period. The main symptoms of weakness, powerlessness, ashen gray, nausea, vomiting, abdominal pain, diarrhea, lightheadedness, chest pain; Severe respiratory and circulatory disorders, breathing shallow, slow without rules, blood pressure drop, small and slow pulse, the temperature dropped, paroxysmal convulsions, coma. Have frequent urination, such as proteinuria.
two, toxicology information and environmental behavior
toxicity : It is a middle class drug.
acute toxicity : LD502730mg/kg (rat oral); 1250mg/kg (percutaneous rabbit); LC5012663mg/m3, 8 hours (rat inhalation ) inhalation> 500ppm, the Asian heart, vomiting, lightheadedness, abdominal pain; inhalation 160ppm × 4 hours, 1 / 2 mild congestive face.
subacute toxicity : cat inhaling its vapor 7mg/m3, 4 hours / day, a total of six months, after an exposure, the conditioned reflex beginning to erode. Pathologic examination showed liver, kidney and lung changes.
Mutagenicity : sex chromosome loss and separation : beer yeast 47600ppm.
reproductive toxicity : hamster oral poisoning lowest dose (TDL0) : 300 mg (progesterone 8 days), cause musculoskeletal abnormalities.
hazardous characteristics : flammable vapor and air can form explosive mixtures. Case open flame, heat or contact with oxidants, the introduction of burning a risk of explosion. With a strong oxidant can respond. Burning a luminous flame. With sulfuric acid, fuming sulfuric acid, chlorosulfonic acid, perchlorate and other violent reaction.
combustion (decomposition) products : carbon monoxide, carbon dioxide, nitrogen oxides, hydrogen cyanide.
3. Emergency Monitoring Methods :
direct inlet gas chromatography
4. Laboratory monitoring methods : gas chromatography
"air of harmful substances in the Determination," "water quality analysis Daquan" Zhang Hong-tao editor
GC "Solid Waste Assessment Test and Analysis Manual "China Environmental Monitoring terminus translated
Nessler'Sreagent colorimetry" chemical substances harmful air Determination "," water quality analysis Daquan "Zhang Hong-tao editor
5. Environmental standards :
China (TJ36-79) Workshop harmful substances in the air that the maximum allowable concentration TWA
China (to be issued), the source of drinking water of harmful substances in the maximum allowable concentration of five. ABA / L
the former Soviet Union (1975) Harmful Substances in Water maximum allowable concentration mg / L
olfactory threshold concentration 68mg/m3
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 self-Pressurized respirators to wear protective clothing. Do not direct contact with leakage. As far as possible, cut off the source of leakage, prevent access to sewers, flood discharge trench so restrictive space. A small leak : activated carbon or other inert materials to absorb. Also available to a large number of irrigation water, diluted Add Water Wastewater System. Large leak : to build a causeway or trenching asylum; The water-spray cooling and dilution steam, the protection of the site personnel, spill into Unburning from dilution. Ex pump used to transfer tankers or exclusive collector, recycling or shipped to the disposal of waste disposal sites.
waste disposal method : incineration. Incinerator emission of nitrogen oxides through the scrubber to remove.
two protective measures
respiratory protection : possible exposure to toxic, must wear a gas mask filter type (full cover), self-contained breathing apparatus or ventilation-contained breathing apparatus. Emergency rescue or evacuation, air respirators to wear.
eye protection : Respiratory Protection has been protective.
physical protection : wear protective clothing 52,400.
hand protection : Wear rubber gloves.
other : work site prohibit smoking, eating and drinking. Work to complete, thorough cleansing. Separate storage of toxic pollution by the clothes, washed standby. Workshops should be equipped with first aid equipment and medicines. Workers should learn how to help themselves and mutual aid.
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, using 1:5000 potassium permanganate or 5% sodium thiosulfate solution gastric lavage. Medical treatment.
fire fighting methods : water cooling containers, if possible to move containers from the scene empty Department. Extinguishing agents : anti-insoluble foam, carbon dioxide, dry, sandy soil. Water fire invalid.
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