Redetermination of 4-hydroxybenzaldehyde

This is a redetermination of the structure of the title compound, C7H6O2, which was first reported by Iwasaki [Acta Cryst. (1977 ▶), B33, 1646–1648]. The results are obtained with greater precision in the present study. Crystal packing is stabilized by intermolecular O—H⋯O interactions between the hydroxyl and aldehyde groups which link the molecules into chains in a zigzag pattern along the [110] plane of the unit cell.