2,3-Diamino­pyridinium 2-hy­droxy­benzoate

In the title mol­ecular salt, C(5)H(8)N(3) (+)·C(7)H(5)O(3) (−), the 2,3-diamino­pyridinium cation is essentially planar, with a maximum deviation of 0.006 (2) Å. In the crystal, adjacent cations and anions are linked by pairs of N—H⋯O hydrogen bonds, generating R (2) (2)(8) loops. These dimers are linked by further N—H⋯O hydrogen bonds and C—H⋯O inter­actions to form sheets lying parallel to (001). A typical intra­molecular O—H⋯O hydrogen bond is also observed in the salicylate (2-hy­droxy­benzoate) anion, which generates an S(6) ring. The crystal structure also features π–π stacking inter­actions between the pyridinium rings of the cations, with a centroid–centroid distance of 3.5896 (15) Å.