Pure Epsom Salts is Magnesium Sulphate, a chemical compound made up of magnesium, sulphur, and oxygen. When dissolved in water, these particles can be absorbed through your skin, providing you with abundant health benefits. Improve sleep, pain relief, reduce inflammation, ease stress, boost energy The chemical name for pure Epsom Salt is Magnesium Sulphate. A chemical compound made up of magnesium, sulphur, and oxygen. When Epsom salts are dissolved in water, it releases magnesium and sulphate ions, these particles can be absorbed through your skin, which serve important bodily functions for optimal health and biochemical reactions that benefit your heart and nervous system