trisodium 5,5'-[(2-sulphonato-1,4-phenylene)bis(azo)]bis(salicylate)

3,3'-[(2-sulfo-1,4-phenylene)bis(azo)]bis[6-hydroxy-benzoic acid trisodium salt

3,3'-[[2-(Sodiosulfo)-1,4-phenylene]bis(azo)]bis(6-hydroxybenzoic acid sodium) salt

Benzoic acid, 3,3'-[(2-sulfo-1,4-phenylene) bis(azo)]bis[6-hydroxy-, trisodium salt