Used in the synthesis of azo dyes and fluorescent dyes due to its ability to form stable diazonium salts. It serves as an intermediate in producing dyes for textiles, paper, and leather. Also employed in the manufacture of optical brightening agents for detergents and paper coatings. Its structure supports fluorescence, making it useful in developing sensors and analytical reagents. Additionally, it finds use in research for labeling biomolecules and studying molecular interactions.