Colorless to white crystalline plates

507-645°C

177.0 g/100 mL (20°C) in water

3.1 g/100 ml (4°C) in ethanol

4.55 g/cm3 (anhydrous)
4.40 g/cm3 (hexahydrate)

1773 °C (decomp)

S22 26 27 36/37/3945

R14 34

WK9275000

Corrosive