Dichloromethane, R 30, narkotil, solaesthin, solmethine, Plastisolve, Refrigerant 30, Dichloromethane, Methane dichloride, Methylene chloride, Methylene dichlorid, 75-09-2

Dichloromethane, R 30, narkotil, solaesthin, solmethine, Plastisolve, Refrigerant 30, Dichloromethane, Methane dichloride, Methylene chloride, Methylene dichlorid, 75-09-2

Dichloromethane

CAS: 75-09-2

Molecular Formula: CH2Cl2

Names and Identifiers

Physico-chemical Properties

Risk and Safety

Hazard Symbols	Xn - Harmful
Risk Codes	R40 - Limited evidence of a carcinogenic effect
Safety Description	S23 - Do not breathe vapour. S24/25 - Avoid contact with skin and eyes. S36/37 - Wear suitable protective clothing and gloves.
UN IDs	UN 1593/1912

Upstream Downstream Industry

Nature

colorless transparent volatile liquid. Has a pungent odor similar to that of an ether. Soluble in about 50 times of water, soluble in phenol, aldehyde, ketone, glacial acetic acid, triethyl phosphate, ethyl acetoacetate, cyclohexylamine. Mixed with other chlorinated hydrocarbon solvents and ethanol, diethyl ether and N,N-dimethylformamide
Soluble. The relative density was 1. 3266. Melting Point -9 5.1 °c. The boiling point was 40 °c. Spontaneous ignition point 640. Viscosity (20 deg C) 0.43mPa.s. Refractive index 4244. The critical temperature is 245 ℃ and the critical pressure is 6. 171MPa. After pyrolysis, HC1 and trace amounts of phosgene were generated, and the formaldehyde and HC1 were generated by long-term heating with water. Further chlorination, CHCl3 and CCl4 were obtained.

Preparation Method

1. Natural gas chlorination reaction of natural gas and chlorine, after absorption of hydrogen chloride by water and by-production of hydrochloric acid, the residual trace of hydrogen chloride is removed with alkali solution, and then dried, compressed, condensed and distilled to obtain the finished product.
2. methyl chloride chlorination methyl chloride and chlorine in the 4000kw light reaction to generate methylene chloride, alkali washing, compression, condensation, drying and distillation to obtain the finished product. The main by-product was chloroform.

Use

This product is not only used for organic synthesis, but also widely used as cellulose acetate film, cellulose triacetate spinning, petroleum dewaxing, aerosol and antibiotics, vitamins, steroids in the production of solvents, and the metal surface paint layer cleaning degreasing and stripping agent. In addition, it is also used for grain fumigation and refrigeration of low-pressure refrigerators and air conditioners. It is used as an auxiliary blowing agent in the production of Polyether urethane foams and as a blowing agent for extruded polysulfone foams.

Safety

• the toxicity is very small, and the consciousness is faster after poisoning, so it can be used as an anesthetic. Irritant to skin and mucous membrane. Young adult rats oral ld501.6ml/kg. The maximum allowable concentration in air is 500 × 10-6. The operation should wear a gas mask, found immediately after poisoning from the scene, symptomatic treatment.
• with galvanized iron drum closed packaging, 250kg per barrel, train tank car, car can be transported. Should be stored in the cold dark dry, well-ventilated place, pay attention to moisture.

Dichloro Methane, Methane dichloride,  Methylene chloride, Methylene dichloride, R 30, narkotil, solaesthin, Plastisolve, 75-09-2

CAS: 75-09-2

Molecular Formula: CH2Cl2

Names and Identifiers

Physico-chemical Properties

Risk and Safety

Hazard Symbols	Xn - Harmful
Risk Codes	R40 - Limited evidence of a carcinogenic effect
Safety Description	S23 - Do not breathe vapour. S24/25 - Avoid contact with skin and eyes. S36/37 - Wear suitable protective clothing and gloves.
UN IDs	UN 1593/1912

Upstream Downstream Industry

Nature

colorless transparent volatile liquid. Has a pungent odor similar to that of an ether. Soluble in about 50 times of water, soluble in phenol, aldehyde, ketone, glacial acetic acid, triethyl phosphate, ethyl acetoacetate, cyclohexylamine. Mixed with other chlorinated hydrocarbon solvents and ethanol, diethyl ether and N,N-dimethylformamide
Soluble. The relative density was 1. 3266. Melting Point -9 5.1 °c. The boiling point was 40 °c. Spontaneous ignition point 640. Viscosity (20 deg C) 0.43mPa.s. Refractive index 4244. The critical temperature is 245 ℃ and the critical pressure is 6. 171MPa. After pyrolysis, HC1 and trace amounts of phosgene were generated, and the formaldehyde and HC1 were generated by long-term heating with water. Further chlorination, CHCl3 and CCl4 were obtained.

Preparation Method

1. Natural gas chlorination reaction of natural gas and chlorine, after absorption of hydrogen chloride by water and by-production of hydrochloric acid, the residual trace of hydrogen chloride is removed with alkali solution, and then dried, compressed, condensed and distilled to obtain the finished product.
2. methyl chloride chlorination methyl chloride and chlorine in the 4000kw light reaction to generate methylene chloride, alkali washing, compression, condensation, drying and distillation to obtain the finished product. The main by-product was chloroform.

Use

This product is not only used for organic synthesis, but also widely used as cellulose acetate film, cellulose triacetate spinning, petroleum dewaxing, aerosol and antibiotics, vitamins, steroids in the production of solvents, and the metal surface paint layer cleaning degreasing and stripping agent. In addition, it is also used for grain fumigation and refrigeration of low-pressure refrigerators and air conditioners. It is used as an auxiliary blowing agent in the production of Polyether urethane foams and as a blowing agent for extruded polysulfone foams.

Safety

• the toxicity is very small, and the consciousness is faster after poisoning, so it can be used as an anesthetic. Irritant to skin and mucous membrane. Young adult rats oral ld501.6ml/kg. The maximum allowable concentration in air is 500 × 10-6. The operation should wear a gas mask, found immediately after poisoning from the scene, symptomatic treatment.
• with galvanized iron drum closed packaging, 250kg per barrel, train tank car, car can be transported. Should be stored in the cold dark dry, well-ventilated place, pay attention