(E)-3-[(2-Hydroxy-3-methoxybenzylidene)amino]benzoic acid

In the title compound, C15H13NO4, the dihedral angle between the substituted benzene rings is 9.9 (8)°. Part of the molecule (the salicylaldimine segment) is disordered over two sets of sites, with a refined site-occupancy ratio of 0.550 (14):0.450 (14). Intramolecular O—H⋯N hydrogen bonds form S(6) ring motifs. In the crystal, pairs of O—H⋯O hydrogen bonds link molecules into centrosymmetric dimers with R 2 2(8) ring motifs. The crystal packing also features C—H⋯π interactions.

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