Cobalt(II)-nitrate hexahydrate, ROTI®METIC 99,999 % (5N), Molar mass (M) 291,04 g/mol, Density (D) 1,87 g/cm³, CAS No. [10026-22-9], UN-Nr. 1477, EG-Nr. 233-402-1, Empirical formula Co(NO3)2 · 6 H2O