white crystalline solid

1.523 (monohydrate)
1.433 (heptahydrate)

2.66 g/cm³ (anhydrous)
2.445 g/cm³ (monohydrate)
1.68 g/cm³ (heptahydrate)
1.512 g/cm³ (11-hydrate)

1124 °C (anhydrous, decomp)
200 °C (monohydrate, decomp)
150 °C (heptahydrate, decomp)
2 °C (11-hydrate, decomp)

1.16 g/100 mL (18 °C, ether)
slightly soluble in alcohol, glycerol
insoluble in acetone

anhydrous
26.9 g/100 mL (0 °C)
25.5 g/100 mL (20 °C)

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heptahydrate
71 g/100 mL (20 °C) in water

odorless

Not listed

OM4500000