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Ethyl vinyl ether（EVE） CAS 109-92-2 is a colorless and flammable liquid with active chemical reaction properties. It is easy to polymerize in liquid or gas phase. Industrial products contain polymerization inhibitors to prevent polymerization. Vapor pressure 57.05kPa/20℃; flash point -45℃; melting point -115.3℃; boiling point 35.6℃; solubility: slightly soluble in water, soluble in most organic solvents such as acetone, benzene, carbon tetrachloride, etc.; density: relative density (Water=1) 0.75; relative density (air=1) 2.5; stability: stable; hazard mark 7 (flammable liquid with low flash point); main purpose: used as a chemical intermediate.
Ethyl vinyl ether paralyzes the central nervous system, and its anesthetic effect is stronger than that of ether, so it is used as an anesthetic and analgesic in medicine. The product is also an intermediate of fine chemicals and can be used in the production of sulfadiazine, disinfectant glutaraldehyde, polymers, coatings, etc. It can also be used to make spices and lubricant additives. ; Used as anesthetic and analgesic in medicine, as an intermediate for fine chemicals, as an intermediate for sulfadiazine, as a monomer for copolymers and as raw material for organic synthesis, and can be used to make perfumes and lubricating oils Additives, etc.
Invasion route: inhalation, ingestion, transdermal absorption.
Health hazards: After inhalation or oral administration, the patient is excited first, then becomes unconscious and paralyzes breathing. The vapor is irritating to the respiratory tract and can cause corneal damage. The liquid is mildly irritating to the skin.
Chronic effects: Repeated exposure may cause liver damage. Long-term skin contact can cause dermatitis due to degreasing.
Acute toxicity: LD506153mg/kg
Hazardous characteristics: Its vapor and air form an explosive mixture, which is easy to burn and explode when exposed to open flames and high heat. It can react with oxidants. Exposure to air or under light conditions can generate potentially explosive peroxides. Its vapor is heavier than air and can spread to a relatively far place in a lower place, and it will reignite when it encounters a fire source. In case of high heat, polymerization reaction may occur, a large amount of exothermic phenomenon may occur, and the container may rupture and explode.
Combustion (decomposition) products: carbon monoxide, carbon dioxide. 
1. Leakage emergency treatment
Evacuate personnel from the contaminated area to a safe area, prohibit irrelevant personnel from entering the contaminated area, and cut off the source of fire. It is recommended that emergency personnel wear self-contained breathing apparatus and general fire protection clothing. Stop leaks while ensuring safety. Spraying water mist will reduce evaporation, but it cannot reduce the flammability of the leakage in the restricted space. Mix and absorb with sand or other non-combustible adsorbents, then collect and transport them to waste disposal sites for disposal. It can also be washed with a large amount of water, and the diluted washing water is put into the waste water system. If there is a large amount of leakage, use the embankment to contain it, and then collect, transfer, recycle or dispose of it after harmless treatment.
2. Protective measures
Respiratory protection: Wear a gas mask when you may be exposed to its vapor. In high-concentration environments, wear self-contained breathing apparatus.
Eye protection: wear chemical safety glasses.
Body protection: wear corresponding protective clothing.
Hand protection: Wear protective gloves when necessary.
Others: Smoking, eating and drinking are strictly prohibited at the work site. After work, take a shower and change clothes. Pay attention to personal hygiene.
3. First aid measures
Skin contact: Take off contaminated clothing and rinse the skin with running water.
Eye contact: Lift the eyelid immediately and rinse thoroughly with plenty of running water.
Inhalation: Leave the scene to a place with fresh air. Give oxygen when breathing is difficult. Once breathing stops, begin CPR immediately. Seek medical attention.
Ingestion: Give enough warm water to the person who accidentally swallows, induce vomiting, and seek medical attention.
Extinguishing methods: foam, carbon dioxide, dry powder, sandy soil. Water extinguishing is ineffective