grayish-white crystals

1.814 (anhydrous)
1.552 (enneahydrate)

slightly soluble in water

sparingly soluble in alcohol
negligible in acetone, ethyl acetate
insoluble in sulfuric acid, ammonia

480 °C (anhydrous)
175 °C (nonhydrate)

3.097 g/cm³ (anhydrous)
1.898 g/cm³ (pentahydrate)

NO8505000

500 mg/kg (oral, rat)

Not listed