Magnesium Sulphate, Ferrous Sulfate, Magnesium Chloride manufacturer / supplier in China, offering Industrial Grade Water Solbuel Magnesium Sulphate Heptahydrate for Water Treatment, Water Soluble Fertilizer Magensium Sulphate Heptahydrate Size2-4mm, Magnesium Fertilizer Purity 99.5% Water Soluble White Crystal Size2-4mm Mgso4.7H2O and so on.