Magnesium Sulphate Hepta Specs: Purity: 99.5%min MG: 9.8% FE: 0.005%max CL: 0.3%max PB: 0.0005%max AS: 0.0005%max Insoluble in the water£º0.1max PH: 6-7 Packing: In 25kgs pp woven bag.