Properties: colorless or white crystals. In dry air easily
weathered. 1.62 relative density. Melting point of 70.75℃, heat to 100℃the loss of crystal water molecules 11, 212℃water become more complex. Soluble in water, insoluble in alcohol.
Was strongly alkaline aqueous solution. Uses: used as analytical reagent, such as co-ordination agent,
precipitating agent. Also be used as soft water, metal cleaning
agent. Also used in sugar purification, photo-offset.