Used as a key intermediate in organic synthesis, particularly in the preparation of fluorescent dyes and conjugated polymers. Its extended π-conjugated system makes it valuable in the development of optoelectronic materials, including organic light-emitting diodes (OLEDs) and sensors. Also employed in cross-coupling reactions to build complex aromatic structures for pharmaceuticals and agrochemicals. Its aldehyde functional groups allow for easy modification in Schiff base formation, useful in coordination chemistry and metal-organic frameworks.