Synonyms: 2-Anthracenesulfonicacid, 1-amino-4-p-anisidino-9,10-dihydro-9,10-dioxo-, sodium salt (7CI);2-Anthracenesulfonic acid,1-amino-9,10-dihydro-4-[(4-methoxyphenyl)amino]-9,10-dioxo-, monosodium salt(9CI); PSB 416; Sodium 1-amino-4-(4-methoxyanilino)anthraquinone-2-sulfonate;Sodium 1-amino-4-(4-methoxyphenylamino)-2-anthraquinonesulfonate