... supply you the highest quality magnesium sulphate heptahydrate , magnesium sulfate heptahydrate1,Properties: Molecular formula:MgSO4 7H2O, Molecular weight:246.48, white or colorless crystal, 2 ... , explosive, match, fireproof material, ma gnesium salt and feed additive magnesium sulphate heptahydrate 99.5% MIN