Bis(2,2′,2′′-nitrilo­triacetamide-κ³O,N,O′)cobalt(II) dinitrate tetra­hydrate

In the centrosymmetric title compound, [Co(C₆H₁₂N₄O₃)₂](NO₃)₂·4H₂O, the Co^II ion, lying on an inversion center, is O,N,O′-chelated by two nitrilo­triacetamide mol­ecules, forming a distorted octa­hedral geometry. In the crystal, extensive O—H...O and N—H...O hydrogen bonds link the complex cations, nitrate anions and lattice water mol­ecules into a three-dimensional network.