The other name of Epsom salt is

Another name of Epsom salt is magnesium sulphate.

Magnesium sulphate is an inorganic salt with a chemical formula MgSO₄.(H₂O)_X where x varies from 0 to 7. More specifically Epsom salt is the hepta hydrate form of Magnesium sulphate. The formula of Heptahydrate Magnesium sulphate is MgSO₄.7H₂O, it has an orthorhombic structure. 
It is odourless, crystalline compound formed when magnesium hydroxide and sulphur dioxide combine in the presence of air. Epsom salt is soluble in water but insoluble in ethanol. 

It is commonly used as a household chemical, and Epsom salt baths are an excellent way to relax muscles, relieve pain in the shoulders, neck, back and skull,as well as relieve stress and detoxify the entire body.