Used in organic synthesis as a building block for pharmaceuticals and functional materials, particularly in the development of conjugated systems for optoelectronic applications. Its aldehyde and ethynyl groups enable dual reactivity, making it valuable in click chemistry and cross-coupling reactions. Commonly employed in the preparation of fluorescent probes and molecular sensors due to its ability to extend π-conjugation in aromatic frameworks. Also finds use in polymer chemistry to introduce reactive sites for further functionalization in conductive polymers.