CAS: 40828-54-4 Molecular Formula: C7H6N2O3S Molecular Weight (g/mol): 198.196 InChI Key: GWXQTTKUYBEZBP-UHFFFAOYSA-N Synonym: 1h-benzoimidazole-2-sulfonic acid,1h-benzo d imidazole-2-sulfonic acid,benzimidazole-2-sulfonic acid,1h-1,3-benzodiazole-2-sulfonic acid,2-benzimidazolesulfonic acid,cambridge id 5140822,1h-benzimidazolesulfonic acid,1h-benzimidazole-2-sulfonicacid,1h-benzimidazole-2-sulfonic acid,9ci PubChem CID: 1572160 IUPAC Name: 1H-benzimidazole-2-sulfonic acid SMILES: C1=CC=C2C(=C1)NC(=N2)S(=O)(=O)O