1.1 This specification covers the three grades of 1,1,2-trichloro 1,2,2-trifluoroethane typically needed in various industries. It may be used as a reference document by purchasers or by persons establishing in-house, 1,1,2-trichloro 1,2,2 This specification covers the three grades of 1,1,2- trichloro 1,2,2 trifluoroethane typically needed in various industries. This may be a reference for 1,1,2-trichloro 1,2,2- trifluoroethane recovery programs. The three classifications are as follows: