... .Export many countries 3.Sample is available 4.Lowest price Magnesium Sulphate Heptahydrate MgSO4.7H2OMOLECULAR FORMULAR: MgSO4.7H2OCAS10034-99-8SPECIFICATION:HG/T ... ,%,≤0.001Cl ,%,≤0.10As ,%,≥0.5Pb ,%,≤1Water insoluble,%,≤0.05 Magnesium Sulphate Heptahydrate MgSO4.7H2O