Hexachloroethane67-72-1100 % similar 1,1,1-Trichloro-2,2,2-trifluoroethane354-58-542 % similar Carbon tetrachloride56-23-533 % similar Chlorobutanol57-15-833 % similar 1,1,1,2,2,3,3-Heptachloropropane594-89-833 % similar