O-toluic acid is a methylbenzoic acid that is benzoic acid substituted by a methyl group at position 2.o-toluic acid appears as pale yellow crystals or off-white flaky solid.
o-Toluic acid, also 2-methylbenzoic acid, is an aromatic carboxylic acid, with formula (CH3)C6H4(COOH). It is an isomer of p-toluic acid and m-toluic acid. When purified and recrystallized, o-toluic acid forms needle-shaped crystals.