Dear Sir, China Zibo Xinfumeng Chemicals is specialized in aluminium sulphate manufacture&supply, pls check out the Spec and looking forward to your inquiry.Al2O3: 16.0%min Fe: 0.5%max PH: 3.0min As: 0.0005%max Pb: 0.002%max Water Insolubles: 0.15%max Grain size: 15mmmax Use: Treatment for the drinking water and water for industrial use.Packing:PP/PE 50kg/bag