title: 3,4,5-Trihy-droxy-benzoic acid.
abstract: In the title compound, C(7)H(6)O(5), the three hy-droxy groups on the ring are oriented in the same direction. There are two intra-molecular O-H⋯O hydrogen bonds in the ring. In the crystal, there are several inter-molecular O-H⋯O hydrogen bonds and a short contact of 2.7150 (18) Å between the O atoms of the para-OH groups of adjacent mol-ecules.
authors.forename: Namon
authors.initials: N
authors.lastname: Hirun
authors.forename: Saowanit
authors.initials: S
authors.lastname: Saithong
authors.forename: Chaveng
authors.initials: C
authors.lastname: Pakawatchai
authors.forename: Vimon
authors.initials: V
authors.lastname: Tantishaiyakul