2-{(E)-[(2-Methyl-3-nitro­phen­yl)imino]­meth­yl}-4-nitro­phenol

The title compound, C₁₄H₁₁N₃O₅, is a Schiff base that adopts the enol–imine tautomeric form in the solid state. The dihedral angle between the aromatic rings is 37.4 (3)° and the dihedral angles between the nitro groups and their attached rings are 4.0 (6) and 46.2 (8)°. The mol­ecular structure is stabilized by an intra­molecular O—H...N hydrogen bond, which generates an S(6) ring motif. In the crystal, molecules are linked by C—H...O interactions, forming a two-dimensional network parallel to the bc plane.