4-(Dimethyl­amino)pyridinium 4-toluene­sulfonate

In the title compound, C(7)H(11)N(2) (+)·C(7)H(7)O(3)S(−), the cation is protonated at the N atom of the heterocyclic ring. The dimethyl­amino group lies close to the pyridinium ring plane with a dihedral angle between the pyridinium and the dimethyl­amine CNC planes of 3.82 (17)°. The N—C bond linking the dimethyl­amino substituent to the pyridinium ring is characteristically short [1.3360 (19) Å], suggesting some delocalization in the cation. In the crystal structure, N—H⋯O hydrogen bonds link individual pairs of cations and anions. The structure is further stabilized by an extensive series of C—H⋯O hydrogen bonds, augmented by π–π [centroid–centroid distance between adjacent pyridinium rings = 3.5807 (10) Å] and C—H⋯π inter­actions, giving a network structure.