Used as a key intermediate in the synthesis of specialty polymers and liquid crystals, particularly in the production of high-performance polyesters and polyimides. Its rigid aromatic structure with aldehyde functional groups enables cross-linking and enhances thermal stability in polymer matrices. Also employed in organic electronics and as a building block in covalent organic frameworks (COFs) due to its ability to form extended conjugated systems through Schiff base reactions. Additionally, it serves in the development of sensors and fluorescent materials owing to its derivatization potential with amine-containing compounds.