colorless, hygroscopic solid

insoluble in ether
slightly soluble in alcohol

12.4 g/100 mL (0 °C)
18.6 g/100 mL (20 °C)
39 g/100 mL (50 °C) in water

>480 °C

1.856 g/cm³ (anhydrous)
1.58 g/cm³ (pentahydrate)
1.43 g/cm³ (nonohydrate)

1176°C (anhydrous)
100°C (pentahydrate)
50°C (nonhydrate)

rotten eggs

R31,R34,R50

1385 (anhydrous)
1849 (hydrate)

Dangerous for the environment (N)

Corrosive (C)

S1/2,S26,S45,S61

016-009-00-8

WE1905000