catena-Poly[[[aqua­[2-(6-chloro­pyridin-3-yl)acetato-κO]sodium]-di-μ-aqua] monohydrate]

The crystal structure of the title compound, {[Na(C7H5ClNO2)(H2O)3]·H2O}n, features polymeric chains along [010]. The Na+ cation is octa­hedrally coordinated by four bridging water mol­ecules, a terminal water mol­ecule and an O atom derived from a monodentate carboxyl­ate ligand. Adjacent polyhedra share two O⋯O edges. The polymeric chains are linked into a three-dimensional network via O—H⋯O and O—H⋯N hydrogen bonds.