Gallic acid monohydrate

In the crystal structure of the title compound, 3,4,5-tri­hydroxy­benzoic acid monohydrate, C7H6O5·H2O, the gallic acid mol­ecule has an intramolecular hydrogen bond involving a pair of hydroxyl groups, and it is also linked to a water mol­ecule by a three-centre (bifurcated) OW—H⋯O hydrogen bond. The packing of the mol­ecules is stabilized by intermolecular O—H⋯O and C—H⋯O hydrogen bonds.