Manganese(II) sulphate monohydrate, min. 97,5 %, extra pure, Molar mass (M) 169,02 g/mol, Density (D) 2,95 g/cm³, CAS No. [10034-96-5], UN-Nr. 3077, EG-Nr. 232-089-9, Empirical formula MnSO4 · H2O