(E)-3-[(3-Eth­oxy-2-hy­droxy­benzyl­idene)amino]­benzoic acid

In the title compound, C(16)H(15)NO(4), a potential bidentate N,O-donor Schiff base ligand, the benzene rings are inclined to one another by 4.24 (12)°. The mol­ecule has an E conformation about the C=N bond. An intra­molecular O—H⋯N hydrogen bond makes an S(6) ring motif. In the crystal, pairs of O—H⋯O hydrogen bonds link the mol­ecules, forming inversion dimers with R (2) (2)(8) ring motifs. These dimers are further connected by C—H⋯O inter­actions, forming a sheet in (104). There is also a C—H⋯π inter­action present involving neighbouring mol­ecules.