Cobalt(II) sulphate hydrate, ROTI®METIC 99,999 % (5N), Molar mass (M) 154,99 + x H2O g/mol, Density (D) 1,948 g/cm³, CAS No. [60459-08-7], UN-Nr. 3077, Empirical formula CoSO4 · x H2O