Used as a fluorescent dye intermediate in the production of high-performance pigments and dyes, particularly for specialty inks and coatings. Its strong fluorescence and thermal stability make it suitable for optoelectronic applications, including organic light-emitting diodes (OLEDs) and sensors. Also employed in biochemical research as a labeling reagent for amines due to its ability to form stable fluorescent derivatives. Its rigid structure enhances photostability, beneficial in long-term imaging and detection systems.