Used as a key intermediate in the synthesis of fluorescent dyes and optical brighteners due to its rigid polycyclic structure and aldehyde functional group. The compound's conjugated system allows for strong light absorption and emission, making it valuable in developing sensors and probes for detecting metal ions or biological molecules. It is also employed in the production of specialty polymers with enhanced photostability and in formulations for UV protection in coatings and inks. Its unique structure supports use in research for developing new photoactive materials and organic semiconductors.