Dichloromethane
Alias: Methylene chloride; Methylene dichloride; Chloromethylene; Methylene bichloride
English name: Dichloromethane
Abbreviation: DCM
Chemical formula: CH2Cl2
Molecular weight: 84.93
CAS registry number: 75-09-2
EINECS number: 200-838-9
Melting point: -97 °C
Boiling point: 39.75 °C
Density: 1.325 g/mL
Flash point: 30
Appearance: Colorless, transparent, volatile liquid with an ether-like odor and sweet taste.
Water solubility: Insoluble in water
Uses:
1. Dichloromethane has the advantage of strong dissolving capacity and is widely used in the production of safety film and polycarbonate. The rest is used as a paint solvent, metal degreasing agent, aerosol propellant, polyurethane foaming agent, release agent, and paint remover.
2. Dichloromethane is a colorless liquid used as a reaction medium in the pharmaceutical industry; it is also used as a solvent in film production, petroleum dewaxing solvent, aerosol propellant, organic synthesis extractant, foaming agent in the production of polyurethane and other foam plastics, and metal cleaning agent.
3. In China, dichloromethane is mainly used in film production and the pharmaceutical field.
4. Used for grain fumigation and refrigeration in low-pressure freezers and air conditioning systems. It serves as an auxiliary foaming agent in the production of polyether urethane foam plastics and as a foaming agent for extruded polysulfone foam plastics.