Synonyms: 5,5’-[vinylenebis[(3-sulpho-p-phenylene)azo]]bis[3-methylsalicylic] acid, lithium sodium salt, compound with 2,2’-(methylimino)diethanol;Benzoic acid, 3,3-1,2-ethenediylbis(3-sulfo-4,1-phenylene)azobis6-hydroxy-5-methyl-, lithium sodium salt, compd. with 2,2-(methylimino)bisethanol;3,3’-[1,2-Ethenediylbis[(3-sulfo-4,1-phenylene)azo]]bis[6-hydroxy-5-methyl-benz oic acid, lithium sodium salt, compd. with 2,2’-(methylimino)bis[ethanol]