Used as a fluorescent labeling reagent in biochemical and analytical applications, particularly for the detection and quantification of thiol groups in proteins and peptides. Its anthracene moiety provides strong fluorescence, enabling high-sensitivity detection in spectroscopic and chromatographic methods. Commonly employed in studies of enzyme activity and biomolecular interactions where real-time monitoring is required. Also utilized in the synthesis of photoresponsive compounds due to its light-sensitive properties.