4-Amino-3-p-chlorobenzyl-4,5-dihydro-1,2,4-triazol-5-one

The title compound, C9H9ClN4O, possesses a triazole ring, which is a typically planar six-pi-electron partially aromatic system, and displays the characteristic features of a 1,2,4-triazole derivative. In the crystal structure, symmetry- related molecules are linked by intermolecular N-H...O and N-H...N hydrogen bonds.