Used in organic synthesis, particularly in the preparation of fluorene-based compounds for optoelectronic materials. Serves as a building block in the development of organic semiconductors, light-emitting diodes (OLEDs), and fluorescent dyes. Its aldehyde group allows for easy functionalization, making it valuable in pharmaceutical research and the synthesis of conjugated polymers. Also employed in the production of specialty resins and as an intermediate in the creation of complex molecular architectures.