Colorless columnar crystal or white crystalloid powder. 128 ℃ lose 1.5 gesso to half hydrate and 163 ℃ above be without water content. The relative density 2.32, melting point ℃ (1450 without water content). Slightly soluble in hot water soluble in alcohols and most organic solvents.
Analytics reagents, also used in water treatment, papermaking, printing, dyeing, metallurgy and coating, adhesive production