... . 1. Uses: in agriculture: mainly used in mixed fertilizer or directly used as fertilizer for rubber, palm trees ;2. In industries: used ... , pigment, match, fireproof materials, Mg-salt, dyeing, medicine and food additives;3. Extensively used in food, pharmaceutical and animal remedy industries ... .20As ,%,≥0.5Pb ,%,≤1Water insoluble,%,≤0.05 Magnesium Sulphate Heptahydrate fertilizer grade