Used as a high-performance monomer in the synthesis of polyimides, particularly for applications requiring excellent thermal stability and mechanical strength. It contributes to the formation of rigid, thermally resistant polymer chains used in aerospace, microelectronics, and advanced composite materials. Its acetylene functionality allows for crosslinking at elevated temperatures, enhancing the material’s durability and resistance to harsh environments. Commonly found in specialty coatings, adhesives, and insulating materials for electronic devices.