Synonyms: Indigotin,5,5',7,7'-tetrachloro- (6CI); [D2,2'-Biindoline]-3,3'-dione, 5,5',7,7'-tetrachloro- (7CI,8CI);5,5',7,7'-Tetrachloroindigo; BASF Brilliant Indigo B; BASF Brilliant Indigo BR;Brilliant Indigo B; C.I. 73040; C.I. Vat Blue 41; Ciba Blue BR; Indigo BR;Mitsui Brilliant Tsuya Indigo B; Tetra Blue BR; Tina Blue BR; Vat Blue 41