3-Amino­pyridinium picrate

During the formation of the title compound, C(5)H(7)N(2) (+)·C(6)H(2)N(3)O(7) (−), a phenolic proton is transferred to the pyridine N atom. In the crystal structure, the ions are linked by inter­molecular N—H⋯O and N—H⋯(O,O) hydrogen bonds into layers running parallel to (100). These layers are connected by weak π–π stacking inter­actions between symmetry-related pyridine and picric benzene rings with a centroid–centroid distance of 3.758 (2) Å, forming a three-dimensional network.