Colorless or white crystalline granules or powder, alias Hao alum. Odorless. Astringent taste. In dry air weathering, 280 ℃ lose all crystal water, more than 500 ℃ decomposition. 1g dissolved in water 0.6ml, 2.5ml glycerin, insoluble in ethanol. Litmus acidic aqueous solution, pH of about 4.5. Containing a molecule of water of crystallization less likely to agglomerate. The relative density of 1.97. 100 ℃ melting point. The minimum lethal dose (rat, oral) 2200mg / kg. Irritation. For the manufacture of lithopone, and used as a mordant, astringent, wood preservatives. Chinese name * zinc English name alias Hao zinc sulfate alum formula ZnSO4 relative molecular mass 161 inorganic chemicals categories - * Salt - zinc Regulatory Type unregulated store sealed cool save