Molecular formula: C8H6Cl2O, CAS No.: 2234-16-4, Mol. Wt: 189.04, Appearance: Colorless crystalline solid, Melting point: 33-34C, Boiling point: 140-150C 15 mmHg, Specific gravity: 1.32 gmml at 25C, Assay: Not less than 99.0% (By GC), Use: Pharmaceutical product.