Abstract
The structure of the title compound, C(6)H(6)O(3), has been redetermined at low temperature [room-temperature structure: Maartmann-Moe (1965 ▶). Acta Cryst. 19, 155-157]. The mol-ecule is planar with approximate D(3h) point symmetry, yet it crystallizes in the chiral ortho-rhom-bic space group P2(1)2(1)2(1) with a three-dimensional hydrogen-bonding network containing infinite O-H⋯O-H⋯O-H chains.