Formula:KAl(SO4)2 12H2O Relative Molecular Weight:474.39 CAS NO,: 7784-24-9 EINECS No.:5637-689-7 HS CODE.: 2833301000 Appearance: lump, white crystal, white powder Properties:Colorless, transparent, particle or crystalline powder, odorless, nontoxic, tastes slightly sweet and puckery, astringent, easily soluble in water, its water solution appears acid,is would lose crystal water and become white powder on heating Usage; Food industry: Buffering agents and leavening agents in food-grade products. Chemical Industry: Water Flocculant, aluminum tanning agents and after-treating agents for leather tanning in the leather industry, dyeing agents,Astringents,mordants etc. Items Specifications Potassium aluminum sulfate [AlK(SO4)2.12H2O] % 99.5 Plumbum(Pb) mg/kg 5.0 Arsenic (As) mg/kg 2.0 Fluorine (F) mg/kg 30.0 Selenium (Se) mg/kg 30.0 Moisture % 4.0