catena-Poly[(di­aqua­cadmium)-μ-iminodi­acetato-κ⁴O,N,O′:O′′]

In the title compound, [Cd(C₄H₅NO₄)(H₂O)₂]_n, the Cd^II atom exhibits a distorted octa­hedral coordination geometry, defined by one N atom and three O atoms from two iminodi­acetate (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 inter­molecular O—H...O and N—H...O hydrogen bonds.