Used as a building block in the synthesis of high-performance polymers and resins due to its rigid aromatic structure and multiple functional groups. Its carboxylic acid groups allow for easy esterification or amidation, making it valuable in creating cross-linked networks for heat-resistant coatings and specialty films. Also employed in the development of metal-organic frameworks (MOFs) where its tetradentate nature helps form stable, porous structures useful in gas storage or catalysis. Additionally, it serves as a precursor in the preparation of certain dyes and fluorescent agents, leveraging its aromatic core for electronic applications.