Used as a key intermediate in the synthesis of fluorescent dyes and optical brighteners due to its ability to form stable coordination complexes. Employed in the preparation of metal-organic frameworks (MOFs) for gas storage and catalysis, where the nitro and carboxylic acid groups provide active binding sites. Also applied in the development of polyamides and polyimides, enhancing thermal stability and rigidity in high-performance polymers. Its derivatives are explored in pharmaceutical research for antimicrobial and antitumor activities.