In the title compound, C(17)H(11)ClN(2)O(3), an intra-molecular O-H⋯N hydrogen bond influences the mol-ecular conformation; the naphthol system and the substituted benzene ring form a dihedral angle of 3.5 (1)°. In the crystal, weak inter-molecular C-H⋯O hydrogen bonds link mol-ecules into chains in the [010] direction The crystal packing exhibits π-π inter-actions between the aromatic rings from the neighbouring mol-ecules, with a centroid-centroid distance of 3.566 (7) Å.