Magnesium Sulphate hepta Characteristics: white or achromaticity crystal granule or powder Molecular Formular: MQSO4·7H2O Specification Item IndexContent of magnesium sulphate(MgSO4·7H2O), % ≥ 99.0 Content of magnesium sulphate(base on Mg),% ≥ 9.7 Arsenic(As)content,% ≤ 0.0002 Content of heavy metal(base on Pb), % ≤ 0.001 Content of chloride(base on C), % ≤ 0.014 Clarity testclarifyFineness(passed 400um test sieve),% ≥ 95