Used in the synthesis of dyes and pigments due to its aromatic structure, o-Toluic acid serves as an intermediate in the production of agrochemicals and pharmaceuticals. It is employed in the manufacture of certain herbicides and fungicides, where it contributes to the development of active ingredients. In organic synthesis, it acts as a building block for more complex molecules, particularly in reactions involving carboxyl and methyl group modifications. Its derivatives are also found in the formulation of plasticizers and polymer stabilizers, enhancing the performance and durability of plastic materials. Additionally, it finds use in research laboratories for the preparation of specialty chemicals and in the development of new synthetic routes.