Characteristic:
Appearance and properties: colorless or white crystals.
Melting point(℃) : 860 (anhydrous)
Relative density (water): 2.05 g/cm3 (20 ℃)
Thermal decomposition: 130 ℃ loss of crystal water
Solubility: soluble in 2.6 parts of H2O, almost insoluble in ethanol, acetone, pyridine.