CAS: 591-35-5 EC No: 209-714-9 MDL No: MFCD00002259 RTECS: SK8820000 UN No: UN2020; Haz Class: 6.1; Packing Group: III Crystalline/Powder Molecular Formula: C₆H₄Cl₂O MW: 163.00 Melting Point: 65-68° Boiling Point: 233°