Used as a key building block in organic synthesis, particularly in the preparation of conjugated polymers and metal-organic frameworks (MOFs). Its alkyne group enables click chemistry reactions, especially copper-catalyzed azide-alkyne cycloaddition (CuAAC), making it valuable in pharmaceutical research and bioconjugation. The carboxylic acid functionality allows for easy attachment to surfaces, nanoparticles, or other molecular scaffolds, useful in sensor development and materials science. Also employed in the synthesis of liquid crystals and advanced optical materials due to its rigid aromatic structure and ability to form stable derivatives.