4-(4-amino-5-methoxy-2-methyl-phenylazo)-benzenesulfonic acid, 2-Methoxy-5-methyl-4-[(4-sulfophenyl)azo]benzenamine, 4-(4-Amino-5-methoxy-2-methyl-phenylazo)-benzolsulfonsaeure, sulfanilic acid cresidine, 4-[(4-Amino-5-methox, 2-methoxy-5-methyl-4-(4-sulfophenylazo)aniline, p-[(4-amino-5-methoxy-o-tolyl)azo]benzenesulphonic acid, p-[(4-amino-5-methoxy-o-tolyl)azo]benzenesulfonic acid