Used as a key intermediate in the synthesis of advanced polymer materials, particularly in the development of high-performance epoxy resins and photoresists. Its ethynyl group enables efficient crosslinking via click chemistry, making it valuable in creating thermoset networks with enhanced thermal stability and mechanical strength. Widely applied in microelectronics and semiconductor manufacturing due to its ability to form precise, durable patterns in lithography processes. Also utilized in specialty coatings where resistance to heat and chemicals is required.