2-(5-Fluoro-3-isopropyl­sulfanyl-1-benzofuran-2-yl)acetic acid

The title compound, C(13)H(13)FO(3)S, was prepared by alkaline hydrolysis of ethyl 2-(5-fluoro-3-isopropyl­sulfanyl-1-benzofuran-2-yl)acetate. In the crystal, the carb­oxy groups are involved in inter­molecular O—H⋯O hydrogen bonds, which link the mol­ecules into centrosymmetric dimers. These dimers are further packed into stacks along the b axis by a slipped π–π inter­action between the furan and benzene rings of neighbouring mol­ecules [centroid–centroid distance = 3.727 (2) Å, inter­planar distance = 3.465 (2) Å and slippage = 1.373 (2) Å]. The crystal structure also exhibits a short S⋯O contact [S⋯O = 3.219 (2) Å].