Used as leather, explosives, paper, porcelain, fertilizer, and oral laxative medicine.Mineral water additive. Magnesium sulfate is used in agriculture as a fertilizer because magnesium is one of the main components of chlorophyll.Crops commonly used in potted plants or magnesium deficiency, such as tomatoes, potatoes, roses, etc.Magnesium sulfate has higher solubility than other fertilizers.Magnesium sulfate is also used as bath salts.