Used as a fluorescent labeling agent in biochemical and analytical applications, particularly for detecting amines and thiols in proteins and peptides. Its derivatives exhibit strong fluorescence with high quantum yields, making them suitable for use in fluorescent probes and sensors. Commonly applied in imaging techniques, including fluorescence microscopy and flow cytometry, due to good photostability and low background interference. Also employed in the development of fluorescent dyes for environmental and pharmaceutical analysis. Shows potential in materials science for designing optoelectronic devices and light-emitting compounds.