Freon 123 Other names: 1,1,1-Trifluoro-2,2-dichloroethane F123 2,2-Dichloro-1,1,1-trifluoroethane Formula: C2HCl2F3 CAS: 306-83-2 Weight: 152,93 g/mol Boiling point: 27,9 °C Melting point: -107 °C Density: 1,48 g/cm3