Synonyms: 1-Naphthol-3-sulfonicacid, 6,6'-iminobis- (6CI);5,5'-Dihydroxy-2,2'-dinaphthylamine-7,7'-disulfonicacid;5,5'-Dihydroxy-7,7'-disulfonic-2,2'-dinaphthylamine;6,6'-Iminobis[1-hydroxy-3-sulfonaphthalene];Bis(1-hydroxy-3-sulfo-6-naphthyl)amine;Bis(5-hydroxy-7-sulfo-2-naphthyl)amine;Di(5-hydroxy-7-sulfo-2-naphthyl)amine;Di-J acid;NCI 1698;NSC 1698;NSC 37203;RW acid;Rhoduline Acid;