Non-flammable

1.717 (anhydrous)
1.458 (dihydrate)
1.412 (trihydrate)

0.0106 g/100 mL (25 °C, anhydrous)
3.75 g/L (20 °C, pentahydrate) in water

soluble in acid, aqueous CO₂
insoluble in acetone, ammonia

-1113 kJ/mol

1.0×10^-5

white solid
hygroscopic

2.958 g/cm³ (anhydrous)
2.825 g/cm³ (dihydrate)
1.837 g/cm³ (trihydrate)
1.73 g/cm³ (pentahydrate)

540 °C decomp. (anydrous)
165 °C (trihydrate)

66 J·mol^-1·K^-1

odorless

OM2470000

Not listed