(E)-2-Hy­droxy­cinnamaldehyde

The asymmetric unit of the title compound, C₉H₈O₂, contains two independent mol­ecules, both of which are essentially planar (r.m.s. deviations = 0.0294 and 0.0284 Å). The C=C double bond is in an E conformation and the vinyl­aldehyde groups adopt extended conformations. In the crystal, mol­ecules are linked by O—H...O hydrogen bonds, forming infinite chains parallel to [101].