MgSO4 · 7H2O MgSO4 · H2O MgSO4 MAIN CONTENT ≥99.0% ≥99.0% ≥98.0% MAGNESIUM SULPHATE(MgSO4) ≥48.59% ≥86.00% ≥98.00% MAGNESIUM OXIDE(MgO) ≥16.24% ≥28.69% ≥32.66% MAGNESIUM(Mg) ≥9.80% ≥17.21% ≥19.6% FERRON(Fe)