In the title structure, C6H9N4 +·C2HO4 -, there are O - H⋯O, N - H⋯N and N - H⋯O hydrogen bonds that form a three-dimensional network. The hydrogenoxalate anions are bonded by O - H⋯O hydrogen bonds to form chains parallel to the b axis. The pyridine-2-carboxamidrazonium cations are linked by the N - H⋯N bonds into dimeric centrosymmetric entities with an R 2 2(10) motif. These dimers are connected to hydrogenoxalates via N - H⋯O hydrogen bonds. In addition, there is a weak C - H⋯O hydrogen bond, as well as a C - H⋯π inter-action with...
