Used primarily as an intermediate in organic synthesis, especially in the preparation of pharmaceuticals and fine chemicals. It serves as a building block in the development of complex molecules due to its reactive carboxylic acid group and aromatic structures. Its bifunctional nature allows for coupling reactions and the formation of esters or amides, making it valuable in drug discovery and the creation of specialty polymers. Additionally, it may be employed in research settings for designing ligands or catalysts in asymmetric synthesis.