Manganese(II) chloride tetrahydrate, min. 98 %, extra pure, Molar mass (M) 197,91 g/mol, Density (D) 2,01 g/cm³, CAS No. [13446-34-9], UN-Nr. 3288, EG-Nr. 231-869-6, Empirical formula MnCl2 · 4 H2O