catena-Poly[(di-aqua-cadmium)-μ-iminodi-acetato-κ(4) O,N,O':O''].

In the title compound, [Cd(C4H5NO4)(H2O)2] n , the Cd(II) atom exhibits a distorted octa-hedral coordination geometry, defined by one N atom and three O atoms from two iminodi-acetate (IDA) ligands and two water molecules. The tridentate IDA ligand additionally bridges via one of its carboxylate O atoms to another Cd(II) atom, thus forming a zigzag chain along [001]. A three-dimensional network is completed by inter-molecular O-H⋯O and N-H⋯O hydrogen bonds.