R142b generally refers to 1,1-difluoro-1-chloroethane, and its molecular formula is C2H3ClF2. Colorless and transparent liquid. Flammable and low toxicity. Insoluble in water, soluble in organic solvents. When there is no moisture, the chemical properties are remarkably stable, and it does not interact with metals, acids, and oxidants below 200°C. It is derived from the reaction of asymmetric difluoroethane and chlorine under ultraviolet irradiation.
Used as refrigerant, dispersant, propellant, foaming agent, and intermediate for aviation propellant.
|Boiling point 101.3KPa（℃）||-9|
|Freezing point 101.3KPa (℃)||131|
|Critical temperature （℃）||137.1|
|Critical pressure （MPa）||4.12|