1-Hydroxy-11H-benzo[b]fluoren-11-one

The title compound, C17H10O2, is nearly planar, the maximum atomic deviation being 0.053 (2) Å. In the molecule, an intramolecular O—H...O hydrogen bond generates an S(6) ring motif. In the crystal, inversion-related molecules are linked by pairs of weak C—H...O hydrogen bonds, forming dimers. π–π stacking is observed in the crystal structure, the closest centroid–centroid distance being 3.7846 (16) Å.