Used as an intermediate in organic synthesis, particularly in the preparation of functionalized fluorene derivatives for optoelectronic materials. Commonly employed in the development of organic semiconductors and light-emitting diodes (OLEDs) due to its conjugated structure. Also serves as a building block in pharmaceutical research for constructing complex polycyclic compounds with potential biological activity. Its halogen substituents allow for further functionalization via cross-coupling reactions such as Suzuki or Heck reactions.