CAS: 7440-38-2 EC No: 213-148-6 MDL No: MFCD00085309 RTECS: CG0525000 UN No: UN1558; Haz Class: 6.1; Packing Group: II Solid Molecular Formula: As MW: 74.92 Melting Point: 817° Boiling Point: 613° (sublimes) Density (g/mL): 5.727