organic compounds
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In the title compound, C5H9N4+·NO3−, the organic cations and the nitrate anions have both crystallographically imposed mirror symmetry and are linked via N—HO hydrogen bonds, forming infinite chains running along the c-axis direction. The values of the N—O bond lengths [1.2256 (19)–1.2642 (18) Å] and O—N—O angles [118.39 (16)–121.64 (15)°] indicate that the nitrate anion exhibits a slightly distorted C3h geometry. The N atom of the NH2 group has sp2 character.