CAS Number: 7447-39-4 UN Number: UN2802 Solubility: 620 g/l (20°C) Melting Point: 498°C decomposes Molar Mass: 134.45 g/mol Density: 3.39 g/cm3 (25°C) pH: 3.5 (50 g/l, H2O, 20°C)