... Export many countries 3.Sample is available 4.Lowest price Magnesium Sulphate Heptahydrate MgSO4.7H2OMOLECULAR FORMULAR: MgSO4.7H2OCAS10034-99-8SPECIFICATION: ... : used in tanning, porcelain, pigment, match, fireproof materials, Mg-salt, dyeing, medicine and food additives; 1. Extensively used in food ... 0.001Cl ,%,≤0.10As ,%,≥0.5Pb ,%,≤1Water insoluble,%,≤0.05 Magnesium Sulphate Heptahydrate MgSO4.7H2O