Manganese(II) nitrate tetrahydrate, min. 98 %, p.a., Molar mass (M) 251,01 g/mol, Density (D) 2,13 g/cm³, Boiling point (bp) 129 °C, CAS No. [20694-39-7], UN-Nr. 2724, EG-Nr. 233-828-8, Empirical formula Mn(NO3)2 · 4 H2O