Synonyms: 2-Anthracenesulfonic acid, 1-amino-9,10-dihydro-4-[[ 2-methyl-5-[[(4-methylphenyl)sulfonyl]amino]phenyl ]amino]-9,10-dioxo-, monosodium salt;sodium 1-amino-4-[2-methyl-5-(4-methylphenylsulfonylamino)phenylamino]anthraquinone-2-sulfonate;1-Amino-4-[2-methyl-5-(p-tolylsulfonylamino)anilino]-9,10-dihydro-9,10-dioxoanthracene-2-sulfonic acid sodium salt;9,10-Dihydro-9,10-dioxo-1-amino-4-[2-methyl-5-(4-methylphenylsulfonylamino)anilino]anthracene-2-sulfonic acid sodium salt