3-(1H-Tetra-zol-5-yl)pyridinium chloride.

In the cation of the title compound, C(6)H(6)N(5) (+)·Cl(-), the pyridinium and tetra-zole rings are nearly coplanar, making a dihedral angle of 5.05 (12)°. The cations and anions are connected by inter-molecular N-H⋯Cl hydrogen bonds, forming a centrosymmetric [2 + 2] aggregate.

2-(2H-Tetra-zol-5-yl)pyridinium nitrate.

In the cation of the title compound, C(6)H(6)N(5) (+)·NO(3) (-), the dihedral angle between the pyridinium and tetra-zole rings is 8.2 (2)°. The constituent ions of the compound are linked via N-H⋯O hydrogen bonds, forming helical chains running along the b axis.