Diaqua-bis-(2-oxo-2H-chromene-3-carboxyl-ato-κO,O)cadmium.

In the title mononuclear cadmium complex, [Cd(C(10)H(5)O(4))(2)(H(2)O)(2)], the Cd(II) atom, located on a crystallographic inversion center, exhibits a slightly distorted octa-hedral geometry and is six-coordinated by two O atoms from water mol-ecules in the axial positions and four O atoms from two deprotonated coumarin-3-carb-oxy-lic acid ligands in the equatorial plane. Angles around the Cd(II) atom vary between 81.00 (5) and 99.00 (0)°. The Cd-O bond lengths vary between 2.1961 (13) and 2.3360 (13) Å. O-H⋯O hydrogen bonds between the H atoms of coordinated water mol-ecules and the O atoms of carboxyl-ate groups link the complex mol-ecules into layers parallel to the ab plane.