Propane-1,3-diaminium bis­(pyridine-4-carboxyl­ate) monohydrate

The asymmetric unit of the title compound, C(3)H(12)N(2) (2+)·2C(6)H(4)NO(2) (−)·H(2)O, consists of half of a doubly protonated propane-1,3-diammonium dication, a pyridine-4-carboxyl­ate anion and half of a solvent water mol­ecule; the dication and the solvent water are located on a twofold rotation axis which passes through the central C atom of the dication and the water O atom. The carboxyl­ate group of the anion appears to be delocalized on the basis of the C—O bond lengths. In the crystal, the components are linked by inter­molecular N—H⋯O, N—H⋯N and O—H⋯O hydrogen bonds.