3-15-00-00865 (Beilstein Handbook Reference) 4-Hydrazinobenzenesulfonic acid 4-Hydrazinobenzenesulphonic acid 4-Sulfophenylhydrazine 98-71-5 AI3-09050 BRN 0514779 Benzenesulfonic acid, 4-hydrazino- Benzenesulfonic acid, p-hydrazino- EINECS 202-694-2 NSC 1608 Phenylhydrazine-4-sulfonic acid Phenylhydrazine-p-sulfonic acid Phenylhydrazinesulfonic acid Sulfanilic acid, N-amino- p-Hydrazinobenzenesulfonic acid p-Hydrazinophenylsulfonic acid p-Sulfophenylhydrazine