Acta Cryst. (2001). E57, o764-o766 [ doi:10.1107/S1600536801012041 ]
Abstract: In the crystal structure of the title compound, 3,4,5-trihydroxybenzoic acid monohydrate, C7H6O5·H2O, the gallic acid molecule is essentially planar and has two intramolecular hydrogen bonds between hydroxyl groups. The H atoms of the three hydroxyl groups are oriented in the same direction around the ring, and form intra- and intermolecular hydrogen bonds. The crystal structure is stabilized by all available intermolecular hydrogen bonds, including also those involving the water molecule.
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