CAS: 7440-42-8 EC No: 231-151-2 MDL No: MFCD00134034 RTECS: ED7350000 UN No: UN3178; Haz Class: 4.1; Packing Group: III Powder Molecular Formula: B MW: 10.81 Melting Point: 2076° Boiling Point: 3927° Density (g/mL): 2.34