4,4' -diaminodiphenyl ether (ODA), as a star raw material for high-performance chemical products, shows excellent product performance. Its application in epoxy resin curing systems is particularly prominent, which can significantly enhance the mechanical strength, thermal stability and electrical insulation of the cured material, and is an ideal choice for wind power blades, aerospace components and high-end electronic packaging materials. ODA participated in the synthesis of polyamide polymers, with excellent chemical corrosion resistance and low moisture absorption, widely used in wear-resistant, high-temperature engineering plastics and fibers. In addition, ODA serves as an intermediate to facilitate the development of high-performance dyes, pharmaceuticals and functional polymers, demonstrating its flexibility and innovative potential for interdisciplinary applications. With these diverse product capabilities, ODA continues to push materials science into a new era of greater efficiency and environmental protection.