N-(4-Amino-1,2,5-oxadiazol-3-yl)formamide

The asymmetric unit of the title compound, C₃H₄N₄O₂, contains two coplanar molecules (A and B) completely located on mirror planes. In the crystal, N—H· · ·O, N—H· · ·N, C—H· · ·O and C—H· · ·N hydrogen bonds link the molecules into sheets parallel to (010). There are neither significant π–π nor C—H· · ·π(ring) interactions. Hirshfeld surface analysis indicates that the most important contributions to the crystal packings of molecules A and B are from H· · ·O/O· · ·H (32.4% for A, 30.1% for B), H· · ·N/N· · ·H (28.2%, 31.5%) and H· · ·H (12.3%, 8.0%) interactions.