Used as an intermediate in the synthesis of fluorescent dyes and labeling reagents for biomolecules. It readily reacts with nucleophiles such as amines and thiols, making it suitable for modifying proteins, peptides, and nucleic acids in biochemical research. Commonly employed in the preparation of fluorescent probes due to its ability to form stable conjugates with detectable emission properties. Also utilized in the development of sensors for detecting biological analytes. Its electron-deficient structure supports use in the construction of more complex heterocyclic systems for pharmaceutical and agrochemical applications.