Tetra­aqua­bis­(3,5-dinitro­benzoato-κO (1))magnesium tetra­hydrate

In the structure of the title compound, [Mg(C(7)H(3)N(2)O(6))(2)(H(2)O)(4)]·4H(2)O, the slightly distorted octa­hedral MgO(6) coord­in­ation polyhedron comprises two trans-related carboxyl­ate O-atom donors from mononodentate 3,5-dinitro­benzoate ligands, and four water mol­ecules. The coordinating water mol­ecules and the four water mol­ecules of solvation give both intra- and inter-unit O—H⋯O hydrogen-bonding inter­actions with carboxyl­ate, water and nitro O-atom acceptors, forming a three-dimensional structure.