CAS: 273-13-2 Molecular Formula: C6H4N2S Molecular Weight (g/mol): 136.18 InChI Key: PDQRQJVPEFGVRK-UHFFFAOYSA-N Synonym: piazthiole,benzisothiadiazole,benzo 1,2,5 thiadiazole,benzo c 1,2,5 thiadiazole,2-thia-1,3-diaza-2h-isoindene,3,4-benzo-1,2,5-thiadiazole,2??,1,3-benzothiadiazole,2,3-benzothiadiazole,3,2,5-thiadiazole,benzo-1,2,5-thiadiazole PubChem CID: 67502 IUPAC Name: 2,1,3-benzothiadiazole SMILES: C1=CC2=NSN=C2C=C1