Used primarily as a building block in organic synthesis, especially in the preparation of pharmaceuticals and agrochemicals. Its reactive ethynyl and chloro groups allow for coupling reactions, such as Sonogashira or Suzuki couplings, enabling the construction of complex aromatic and heterocyclic systems. It is also employed in the development of functional materials, including liquid crystals and organic semiconductors, due to its rigid aromatic backbone and ability to undergo further functionalization. Its versatility makes it valuable in research settings for designing novel compounds with targeted biological or electronic properties.