Magnesium Sulphate heptahydrate, CAS No:10034-99-8 Molecular Formula:MgSO4.7H2O Molecular weight: 246.48, Appearance: white crystal, Spectiction: assay: 99%min, MgO:16.0%min, Cl: 0.1% max, Mg: 9.8%min, S:12.5%min , Package:25kg plastic woven bags, 25mt/20'fcl