Poly[di-μ(3)-hy­droxy[μ(4)-5-(4-carb­oxy­phen­yl)pyridine-2-carboxyl­ato-κ(5) N,O (2):O (2′):O (4):O (4′)]dicadmium]

The asymmetric unit of the title polymeric complex, [Cd(2)(C(13)H(7)NO(4))(OH)(2)](n), consists of two independent Cd(II) atoms, one 5-(4-carb­oxy­phen­yl)pyridine-2-carboxyl­ate ligand and two hy­droxy groups. One Cd(II) atom is six-coordinated by two O atoms from two ligand mol­ecules and by four μ(3)-OH groups in a distorted trigonal–prismatic geometry. The other is five-coordinated by one N and two O atoms from two ligands and by two μ(3)-OH groups, forming a distorted square-pyramidal geometry. The two independent Cd(II) atoms are connected by the ligand mol­ecules and the OH groups into a three-dimensional framework. O—H⋯O hydrogen bonds between the OH groups and the carboxyl­ate O atoms are observed.