Magnesium Sulfate

*Assay（MgSO4）≥%:99.0
*Heavy metal(Pb) ≦%:0.001
*Pb ≦%:0.0002
*Se ≦%:0.003
*PH value ≦%:5.5-7.5
*Cl ≦%:0.03
*As ≦%:0.0003
*Fe ≦%: 0.002