Synonyms: disodium 3,3'-[carbonylbis(imino-p-phenyleneazo)]bis[6-hydroxy-5-methylbenzoate];Benzoic acid, 3,3'-[carbonylbis(imino-4, 1-phenyleneazo)]bis[6-hydroxy-5-methyl-, disodium salt;3,3'-Ureylenebis(4,1-phenyleneazo)bis(6-hydroxy-5-methylbenzoic acid sodium) salt;5,5'-(Ureylenebis((p-phenylene)azo)bis(3-methylsalicylic) acid, disodium salt;5,5'-(Ureylenebis(p-phenyleneazo))di-2,3-cresotic acid, disodium salt;Benzoic acid, 3,3'-(carbonylbis(imino-4,1-phenyleneazo))bis(6-hydroxy-5-methyl-, sodium salt (1:2);Einecs 266-281-9