3-Amino-1-methylpyrazin-1-ium iodide

In the cation of the title compound, C5H8N3+center dot I-, the C-N(H-2) bond distance [1.338 (8) angstrom] is at the lower end of the range for aryl amines. In the crystal structure, cations and anions are linked via N-H center dot center dot center dot I hydrogen bonds, forming centrosymmetric four-component clusters.