Synonyms: 1,6,7,12-Tetrachloro-3,4:9,10-perylenetetracarboxylicdianhydride;1,6,7,12-Tetrachloroperylene-3,4:9,10-tetracarboxylic aciddianhydride;1,6,7,12-Tetrachloroperylene-3,4:9,10-tetracarboxylic dianhydride;5,6,12,13-Tetrachloroperylenetetracarboxylic dianhydride;Perylo[3,4-cd:9,10-c'd']dipyran-1,3,8,10-tetrone,5,6,12,13-tetrachloro-;