... : Tianjin, China 2, MgSO4.7H2O 3, white crystal MAGNESIUM SULPHATE(feed grade) NoTest ItemTechnical specification (%)Analysis Results(%)1Purity99.599.822Mg9.79.733MgO1616 ... with 40bags in one pallet it is widely used in feed additive, aquiclture , Feed grade Magnesium Sulphate