Magnesium sulfate heptahydrate Used in food, fertilizer, additive, and for industry and agriculture magnesium sulfate heptahydrate1).MgSO4.7H2OMgSO4≥99%, Mg≥9.7%, As≤0.0002%, Pb≤0 ... : 99.8%2) Appearance: white crystal3) Used in food, fertilizer, additive, and for industry and agriculture applicationsInner packing: 25kg/PP net bag Magnesium sulfate heptahydrate 99.8 ...