Used as a key intermediate in the synthesis of fluorescent whitening agents (optical brighteners) for textiles, paper, and detergents. Its structure supports strong UV light absorption and blue light emission, enhancing the brightness and whiteness of materials. Also employed in the production of specialty dyes and pigments. Shows potential in polymer chemistry for developing high-performance, light-stable materials. Investigated for use in sensors and photoactive coatings due to its responsive aromatic system.