1,2,2-Trichloro-1,1-difluoroethane Other names: 1,1-Difluoro-1,2,2-trichloroethane F122 Freon 122 Formula: C2HCl3F2 CAS: 354-21-2 Weight: 169,39 g/mol Boiling point: 72 °C Melting point: -73 °C Density: 1,571 g/cm3