Epsom is an inorganic salt with a chemical name Magnesium sulphate (MgSO4). It is also known as Sulphuric acid magnesium salt or Magnesium sulphate anhydrous. (1 Mark) It is commonly referred to as Epsom salt. Magnesium sulphate is a crystalline solid that has a white appearance and is odourless. (1 Mark) One of the main applications of magnesium sulphate is to be used as a fertilizer in farming and gardening. (1 Mark)