3.856 g/cm³ (anhydrous)
3.0979 g/cm³ (dihydrate)

Non-flammable

962 °C
960 °C (dihydrate)

White solid

−858.56 kJ/mol

1560 °C

31.2 g/100 mL (0 °C)
35.8 g/100 mL (20 °C)
59.4 g/100 mL (100 °C) in water

soluble in methanol, insoluble in ethanol, ethyl acetate

CQ8750000 (anhydrous)
CQ8751000 (dihydrate)

Toxic (T)

Harmful (Xn)

S1/2,S45

R20,R25

056-004-00-8