... 1,1,1,2,2-Pentafluoroethane (IUPAC); Hydrofluorocarbon 125; R-125; FC-125De: Pentafluorethan ES: Pentafluoroetano Fr: PentafluoroéthaneCAS ... of gas-phase fluoridation between perchloroethylene (PCE) and hydrofluoric acid (HF). The intermediates of reaction are HCFC-123 and ... component of azeotropic blend refrigerant such as R-404a, R-407a, R-407b, R-407c, R-407d, R-410a and R410b (for more information, ...