Commodity : Magnesium sulfate heptahydrate Molecular Weight :246.48 Appearance White small crystal Main content 99.0% min MgO 16.0% min S 12.8% min PH(5W/V%Sol) 5-7 Ferron(Fe) 0.001% max Chlorid(Cl) 0.015% max Heavy metal (Pb) 0.001%max Arsenic(As) 0.0002% max Insoluble 0.001%max Size (mm) 0.1-1 Packing : 25kgs/bag