Used as a key intermediate in organic synthesis, particularly in the preparation of pharmaceuticals and agrochemicals. Its alkyne functionality allows for coupling reactions, such as Sonogashira coupling, enabling the construction of complex conjugated systems. It is also employed in the development of liquid crystals and organic electronic materials due to its rigid biphenyl structure and ability to extend π-conjugation. Additionally, it serves as a building block in the synthesis of functional polymers and ligands for catalysis.