a 50:50 isomeric mixture of HCFC-225ca (3,3-dichloro-1,1,1,2,2-pentafluoropropane) and HCFC-225cb (1,3-dichloro-1,1,2,2,3-pentafluoropropane); proposed as a substitute for CFC-113; inhalation toxicity in liver of rats was reversible following 14 days of recovery