2 English reference methyl formate
3 GBNo。 3 1037
Four cases. 1073 13
5 Chinese name methyl formate
6 English name methyl format
Another name for methyl formate: methyl formate
8 molecular formula C2H4O2；; HCOOCH3
Appearance and properties: colorless liquid with aromatic smell.
10 molecular weight 60.05
1 1 vapor pressure 53.32kPa/ 16℃
12 Flash point 32℃
13 melting point 99.8℃
14 boiling point 32.0℃
15 is soluble in water, ethanol, ether and methanol.
16 relative density (water10.98); Relative density (air 1)2.07
17 stable.
18 harmful methyl formate is a liquid with low flash point, which may cause combustion danger when exposed to heat, open flame and oxidant.
18. 1 explosion limit 4.5%~32.0%,
18.2 ignition temperature 449℃,
18.3 combustion heat 978.7kJ/mol (liquid 25℃)
18.4 danger sign 7 (flammable liquid with low flash point)
19 is mainly used for organic synthesis, solvents for acetate fibers, analytical reagents, etc.
Invasive routes of health hazards: inhalation, ingestion and percutaneous absorption.
Health hazard: This product has anesthetic and * * * effects. People exposed to a certain concentration of this product have obvious * * * effect; Repeated contact can lead to convulsions and even death.
2 1 Toxicological data and acute toxicity of environmental behavior: LD50 1622mg/kg (orally taken by rabbits).
Subacute and chronic toxicity: the cat inhaled 2300 mg/m3 for 25 hours, 1 hour for 30 minutes, and died after lying on its side for 2-3 hours (pulmonary edema); Guinea pigs died after inhaling 25g/m3× 3 ~ 4 hours. Human oral 500mg/kg, minimum lethal dose.
Hazard characteristics: extremely flammable, and its vapor can form an explosive mixture with air. Danger of burning and explosion in case of open flame, high heat or contact with oxidant. In a fire, the heated container is in danger of explosion. Its vapor is heavier than air, and it can spread to a considerable distance at a lower place, which will lead to tempering when it meets an open flame.
Combustion (decomposition) products: carbon monoxide and carbon dioxide.
22 laboratory monitoring method direct injection gas chromatography (WS/T 166 1999, workplace air)
In the air: the samples were collected by activated carbon tube and analyzed by gas chromatography.
For gas chromatography, see Handbook of Analytical Chemistry (Volume IV, Chromatographic Analysis) of Chemical Industry Press.
Environmental protection standard: What is the maximum allowable concentration of harmful substances in the air of workshops in the former Soviet Union? 250 mg/m3
The olfactory threshold concentration in the air is 66 ~ 72 ppm.
24 Emergency response to leakage will quickly evacuate the personnel in the leaked contaminated area to a safe area, isolate them, and strictly restrict access. Cut off the fire. It is recommended that emergency personnel wear self-contained positive pressure breathing apparatus and fire protection clothing. Cut off the leakage source as much as possible. Prevent access to confined spaces such as sewers and flood discharge ditches. Small amount of leakage: adsorbed or absorbed by sand or other nonflammable substances. It can also be washed with plenty of water, diluted and put into the wastewater system. A large number of water leaks: build a dike or dig a pit to accommodate; Cover with foam to reduce steam disaster. Use explosion-proof pump to transfer it to tank car or special collector, and recycle it or transport it to waste disposal site for treatment.
Waste disposal method: incineration.
25 Protective measures Respiratory system protection: When the concentration in the air exceeds the standard, you should wear a self-priming filter gas mask (half mask). Air respirator is recommended for emergency rescue or evacuation.
Eye protection: Wear chemical safety glasses.
Physical protection: wear anti-static work clothes.
Hand protection: wear latex gloves.
Others: Smoking is strictly prohibited in the workplace. After work, take a shower and change clothes. Pay attention to personal hygiene.
26 First-aid measures Skin contact: Take off the contaminated clothes and rinse the skin thoroughly with soapy water and clean water.
Eye contact: Lift eyelids and rinse with running water or normal saline. See a doctor.
Inhalation: leave the scene quickly and go to a place with fresh air. Keep the respiratory tract unobstructed. If you have difficulty breathing, give oxygen. If breathing stops, give artificial respiration immediately. See a doctor.
Ingestion: Drink plenty of warm water, induce vomiting and seek medical advice.