Synonyms: Disodium 2,2'(or 3,3')-((4,8-diamino-3,7-dibromo-9,10-dihydro-9,10-dioxoanthracene-1,5-diyl)diimino)bis(5(or 6)-methylbenzenesulphonate);Benzenesulfonic acid, 2,2'(or 3,3')-((4,8-diamino-3,7-dibromo-9,10-dihydro-9,10-dioxo-1,5-anthracenediyl)diimino)bis(5(or 6)-methyl-, disodium salt