trihydrate:
137.8 g/100 mL (0 °C)
1270 g/100 mL (100 °C) in water

hydrates very soluble in ethanol, ammonia, water; insoluble in ethyl acetate

blue crystals
hygroscopic

256 °C (anhydrous, decomp)
114.5 °C (trihydrate)
26.4 °C (hexahydrate, decomposes)

3.05 g/cm³ (anhydrous)
2.32 g/cm³ (trihydrate)
2.07 g/cm³ (hexahydrate)

170 °C (trihydrate, decomposes)

Irritant, Oxidizer

GL7875000

Not listed