Magnesium nitrate hexahydrate, ROTI®METIC 99,999 % (5N), Molar mass (M) 256,41 g/mol, Density (D) 1,46 g/cm³, CAS No. [13446-18-9], EG-Nr. 233-826-7, Empirical formula Mg(NO3)2 · 6 H2O