(Fertilizer)Magnesium sulphate(MgSO4.7H2O)used as fertilizer. (Fertilizer)Magnesium sulphate(MgSO4.7H2O)quality index:AppearanceWhite small granularMain content99.5% minMgSO448.59% minMgO16.27% minMg9.81% minPH(5W/V%Sol)5-9Ferron(Fe)0.0015% maxChloride(CL)0.015% maxHeavy metal (Pb)0.0008% maxArsenic(As)0.0002% maxInsoluble0.01% maxSize (mm)0.1-1 0.2-3 1-4 Laizhou Xinhe Chemical Co. Ltd is a company specializing in the production and export of high quality Magnesium Sulphate heptahydrate.Our factory makes only this product, and we are the only factory that is around Mg mine, so we are very professional. our company is near the Seaport,so i am sure to give you the cheapest price that other companies couldnot. The product that we offer you is white,dry partical. free flowing. Delivery time is within one week(our daily production is 100tons). Every week we export to other countries, so please donot worry about the quality.