N′-[(1E)-1-(4-Chlorophenyl)ethylidene]formohydrazide

The structure of the title compound, C9H9ClN2O, consists of centrosymmetric dimers due to intermolecular N—H...O hydrogen bonding, forming R22(8) ring motifs. The dihedral angle between the p-chlorophenyl unit and the remaining heavy-atom group is 6.77 (17)°.