1,1'-(Carbonyldiimino)bis(4-((4-(((3-carboxy-2-hydroxy-5-sulfophenyl)amino)carbonyl)phenyl)azo)-3-methylbenzene), tetrasodium salt 60033-73-0 6420-28-6 Benzoic acid, 3,3'-(carbonylbis(imino(2-methyl-4,1-phenylene)azo-4,1-phenylenecarbonylimino))bis(2-hydroxy-5-sulfo-, tetrasodium salt EINECS 229-153-3 Tetrasodium 3,3'-(carbonylbis(imino(2-methyl-4,1-phenylene)azo-4,1-phenylenecarbonylimino))bis(5-sulphonatosalicylate)