CAS: 7774-29-0 EC No: 231-873-8 MDL No: MFCD00011044 RTECS: OW5250000 UN No: UN1638; Haz Class: 6.1; Packing Group: II Powder Molecular Formula: HgI₂ MW: 454.40 Melting Point: 259° Boiling Point: 354° Density (g/mL): 6.36