4-Cyano-1-methyl-pyridinium nitrate.

The title mol-ecular salt, C7H7N2 (+)·NO3 (-), displays an inter-penetrating sheet structure parallel to a with each sheet containing nearly coplanar cations and anions, each ion being bis-ected by a crystallographic mirror plane. C-H⋯O hydrogen bonds involving both ring and methyl H atoms in addition to cation-cation C-H⋯N hydrogen bonds (ring H to cyano N) serve to link the sheets together. In each set of parallel layers, the cations and anions stack with short distances of 3.094 (2) (between aligned nitrate N and pyridine N atoms) and 3.057 (2) Å (between a nitrate O atom and the ring centroid). This motif is strikingly similar to the one that features in the isomeric salt 2-cyano-1-methyl-pyridinium nitrate.