Used primarily as a building block in organic synthesis, especially in the production of pharmaceuticals and agrochemicals. Its alkyne functionality allows it to participate in coupling reactions, such as Sonogashira and Glaser couplings, making it valuable in the development of complex molecules. It is also employed in the synthesis of specialty polymers and liquid crystals due to its rigid structure and reactivity. In research, it serves as an intermediate for introducing ethynyl groups into larger aromatic systems, aiding in the design of functional materials and bioactive compounds.