Used as a key intermediate in the synthesis of fluorescent dyes and organic semiconductors due to its conjugated aldehyde and hydroxyl groups. Its structure supports metal coordination, making it useful in developing sensors for metal ion detection. Also employed in the preparation of covalent organic frameworks (COFs) for applications in catalysis and gas storage. The compound’s photophysical properties enable its use in optoelectronic devices and as a building block in conjugated polymers.