Manganese sulphate Other names: Manganese sulfate, manganoussulfate, manganese sulphate, manganic sulfate, manganic sulfate, manganic sulphate, manganous sulphate.Manganese sulfate is the inorganic compound with the formula MnSO4. ... . Like many metal sulfates, manganese sulfateforms a variety of hydrates: monohydrate, tetrahydrate, pentahydrate,heptahydrate. The monohydrate is most common. All of ...