Redetermination of 3-hydroxy-2-naphthoic acid

The title compound, C₁₁H₈O₃, previously reported by Gupta & Dutta [Cryst. Struct. Commun. (1975), 4, 37–40] has been rerefined against new intensity data. Geometric parameters of the C and O atoms agree quite well. However, the positions of the hydroxyl H atoms differ slightly. Furthermore, the results of the present structure determination are of significantly higher precision.