4-(4-Pyrid­yl)pyridinium penta­aqua(pyridazine-4,5-dicarboxyl­ato)praseodymate(III)

In the title complex, (C10H9N2)[Pr(C6H2N2O4)2(H2O)5], the Pr atom is nine-coordinated by nine O atoms from two pyridazine-4,5-dicarboxyl­ate anions and five water mol­ecules. It is noteworthy that there is a protonated bipyridine mol­ecule in the structure. Inter­molecular O—H⋯O, O—H⋯N and N—H⋯N hydrogen bonds are present, resulting in a three-dimensional network.