Synonyms: 2-Anthracenesulfonicacid, 1-amino-9,10-dihydro-4-[(2-methylphenyl)amino]-9,10-dioxo-, monosodiumsalt (9CI); 2-Anthracenesulfonic acid,1-amino-9,10-dihydro-9,10-dioxo-4-o-toluidino-, monosodium salt (8CI);2-Anthracenesulfonic acid, 1-amino-9,10-dihydro-9,10-dioxo-4-o-toluidino-,sodium salt (7CI)