Synonyms1,3-Dihydro-1-oxo-5-isobenzofurancarboxylic Acid;1,4-Benzenedicarboxylic acid, (hydroxymethyl)-, ?-lactone;1-Oxo-1,3-dihydroisobenzofuran-5-carboxylic Acid;Phthalide-5-carboxylic Acid Close 1,3-Dihydro-1-oxo-5-isobenzofurancarboxylic Acid;1,4-Benzenedicarboxylic acid, (hydroxymethyl)-, ?-lactone;1-Oxo-1,3-dihydroisobenzofuran-5-carboxylic Acid;Phthalide-5-carboxylic Acid Related products 5-Carboxyphthalide M.F. M.W. 178.14 CAT# AR-C04119 CAS# 4792-29-4