Used as a building block in organic synthesis, particularly in the preparation of pharmaceuticals and fine chemicals. Its dual carboxylic acid functionality allows for selective reactions, making it valuable in constructing complex molecules. Commonly employed in the development of metal-organic frameworks (MOFs) due to its ability to chelate metal ions. Also utilized in the synthesis of polymers and resins where controlled cross-linking is required. Its aromatic structure with carboxyl groups supports applications in designing functional materials for catalysis and sensing.