Synonyms: 2,4-Cyclohexadien-1-one,hexachloro- (6CI,7CI); 2,2,3,4,5,6-Hexachloro-2,4-cyclohexadien-1-one;2,2,3,4,5,6-Hexachlorocyclohexadienone;2,3,4,5,6,6-Hexachloro-2,4-cyclohexadien-1-one;2,3,4,5,6,6-Hexachloro-2,4-cyclohexadienone; Hexachloro-2,4-cyclohexadienone