(E)-N'-(5-Chloro-2-hydroxy-benzyl-idene)-2-nitro-benzohydrazide.

In the title Schiff base compound, C(14)H(10)ClN(3)O(4), the mol-ecule adopts an E geometry with respect to the C=N bond and an intra-molecular O-H⋯N hydrogen bond is present. The benzene rings form a dihedral angle of 73.4 (2)°. In the crystal, inversion dimers linked by pairs of N-H⋯O hydrogen bonds occur.