CAS: 7440-28-0 EC No: 231-138-1 MDL No: MFCD00134063 RTECS: XG3425000 UN No: UN1707; Haz Class: 6.1; Packing Group: II Solid, packaged in water Molecular Formula: Tl MW: 204.38 Melting Point: 303° Boiling Point: 1457° Density (g/mL): 11.8