... -99-8 (MgSO47H2 magnesium sulphate Molecular Formula: MgSO4nH2O(n=0,1,2,3,4,5,6,7)Molecular Weight: 120.37+18n ... -8 (MgSO47H2O)7487-88-9 (MgSO4 )Specification (Up to USP /BP/CP/EP Standard ) Grade ItemMagnesium Sulphate HeptahydrateMagnesium Sulfate PentahydrateMagnesium Sulphate ... .3028.6032.60Mg % min9.8011.3113.6515.2317.2119.6PH(5% Solution)5.0-9.25.0-9.25.0-9.25.0 ...