CAS number of 1,1,2,2-tetrachloro-1,2-difluoroethane vs 1,1,2-trichlorotrifluoroethane

1, 1, 2, 2-tetrachloro-1, 2-difluoroethane 1, 1, 2-trichlorotrifluoroethane | CAS number

1, 1, 2, 2-tetrachloro-1, 2-difluoroethane | 76-12-0 1, 1, 2-trichlorotrifluoroethane | 76-13-1