(±)-2,2-Dimethyl-5-oxotetra­hydro­furan-3-carb­oxy­lic acid (terebic acid): a racemic layered structure

A racemic crystalline form of terebic acid, C₇H₁₀O₄, which is an important industrial chemical compound, is reported for the first time. The crystal structure is stabilized by O-H...O and C-H...O hydrogen bonds which form racemic double layers parallel to (001).