Bis(μ-3-hy­droxy­benzoato)-κ(3) O (1),O (1′):O (1);κ(3) O (1):O (1),O (1′)-bis­[(3-hy­droxy­benzoato-κ(2) O,O′)(iso­nicotinamide-κN (1))cadmium] tetra­hydrate

In the title centrosymmetric binuclear Cd(II) compound, [Cd(2)(C(7)H(5)O(3))(4)(C(6)H(6)N(2)O)(2)]·4H(2)O, the six-coordinated Cd(II) atom is chelated by the carboxyl­ate groups of the two 3-hy­droxy­benzoate (HB) anions; the two monomeric units are bridged through the two O atoms of the two carboxyl­ate groups. In the crystal, O—H⋯O, N—H⋯O and C—H⋯O hydrogen bonds link the mol­ecules into a three-dimensional network. π–π Contacts between the pyridine rings and between the benzene rings [centroid-centroid distances = 3.770 (1), 3.769 (1) and 3.632 (1) Å] may further stabilize the structure.