Magnesium sulfate Wikipedia
Magnesium sulfate (Magnesium sulphate in British English) is a chemical compound, a salt with the formula MgSO 4, consisting of magnesium cations Mg 2+ (% by mass) and sulfate anions SO 2 is a white crystalline solid, soluble in water but not in ethanol.. Magnesium sulfate is usually encountered in the form of a hydrate MgSO 4 #183;nH 2 O, for various values of n between 1 and 11.