Used as a building block in organic synthesis, particularly in the development of pharmaceuticals and agrochemicals. Its alkyne functionality allows it to participate in coupling reactions, such as Sonogashira and Glaser couplings, enabling the construction of complex aromatic and conjugated systems. It is also employed in the synthesis of functional materials, including organic semiconductors and liquid crystals, due to its ability to extend π-conjugation in molecular frameworks. Additionally, it serves as an intermediate in the preparation of specialty polymers and photoactive compounds.