Used as a key intermediate in the synthesis of fluorescent dyes and bioimaging agents due to its strong electron-withdrawing properties and ability to enhance photostability. Its structure supports conjugation in organic semiconductors, making it valuable in optoelectronic materials such as OLEDs and sensors. Also employed in medicinal chemistry for developing kinase inhibitors and other biologically active compounds, leveraging its heterocyclic core for target binding. Commonly utilized in fluorescence labeling of biomolecules for research and diagnostic applications.