Magnesium Sulphate Heptahydrate Assay:99% min Ferrous:0.005% max Chloride:0.03% max Heavy Metal:0.002% max Magnesium Sulphate Heptahydrate Product NameMagnesium sulphate heptahydrateCAS No.10034-99-8Molecular Weight246.48Structural FormulaMgSO4.7H2 ODescriptionMagnesium sulfate, another name, Epsom salt, bitter salt, white or colorless crystal, odorless, cool, little bitter, dissolve in water ...