Biphenyl-2,4,4′,6-tetra­carb­oxy­lic acid monohydrate

In the title compound, C₁₆H₁₀O₈·H₂O, the dihedral angle between the benzene rings is 71.59 (8)°. The COOH groups make dihedral angles of 10.3 (2), 30.8 (2), 11.3 (2) and 42.3 (2)° with their attached rings. In the crystal, O—H...O hydrogen bonds link the components forming a three-dimensional supra­molecular network.