Used as a key intermediate in organic synthesis, particularly in the preparation of conjugated polymers and pharmaceuticals. Its reactive ethynyl groups enable coupling reactions, such as Sonogashira and Glaser couplings, making it valuable in the development of optoelectronic materials and molecular electronics. Commonly employed in the construction of rigid, linear molecular architectures for use in organic semiconductors and luminescent compounds. Also finds application in medicinal chemistry as a building block for kinase inhibitors and other bioactive molecules.