Poly[di-μ(3)-hy-droxy[μ(4)-5-(4-carb-oxy-phen-yl)pyridine-2-carboxyl-ato-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-carb-oxy-phen-yl)pyridine-2-carboxyl-ate ligand and two hy-droxy groups. One Cd(II) atom is six-coordinated by two O atoms from two ligand mol-ecules 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 mol-ecules and the OH groups into a three-dimensional framework. O-H⋯O hydrogen bonds between the OH groups and the carboxyl-ate O atoms are observed.