Synonyms: Benzoicacid, 3,5-diamino-2-[(p-sulfamoylphenyl)azo]- (6CI,8CI);Benzoic acid,3,5-diamino-2-[[4-(aminosulfonyl)phenyl]azo]- (9CI);3,5-Diamino-2-[4'-(sulfamylphenyl)azo]benzoic acid;3,5-Diamino-2-[p-(sulfamoylphenyl)azo]benzoic acid; Azo compound no. 4;Azoique4;Carboxysulfamidochrysoidine;Collubiazol;Girard's Rubiazol;Prontosil III;Rubiazol;Rubiazol C;Rubiazol II;Rubiazol IV;Rubiazole;Sulfachrysoidin;Sulfachrysoidine