Magnesium Sulphate Heptahydrate 1.99% agricuture grade 2.transparent crystal 3.main contain 99%min 4.special ... and food additives;3. Extensively used in food, pharmaceutical and animal remedy industries. ITEMSFine gradeMgSo4.7H2O,≥99.0Fe ,%,≤0.002Cl ,%,≤0 ... ,%,≥0.5Pb ,%,≤1Water insoluble,%,≤0.05 Magnesium Sulphate Heptahydrate fertilizer grade