... Company 2) Magnesium Sulphate Heptahydrate 3) HS Code 28332100 Magnesium Sulphate HeptahydrateMolecular Formula: MgSO4nH2O(n=0,1,2,3,4,5,6 ... ,7)Molecular Weight: 120.37+18n (n= 0,1,2,3,4,5,6,7) CAS No ... dehydration agent of feed and fertilizer. Magnesium Sulphate Heptahydrate( HS Code 28332100)