Benzenesulfonic acid,3-hydrazinyl, phenylhydrazine-3-sulfonic acid, Phenylhydrazin-sulfonsaeure-(3), Benzenesulfonic acid,3-hydrazino, m-hydrazinobenzenesulfonic acid, phenylhydrazine-3-sulphonic acid, 3-hydrazino-benzenesulfonic acid, m-Hydrazinobenzenesulphonic acid, 3-Hydrazino-benzolsulfonsaeure