4,4'-Diaminodiphenyl Ether (ODA) as an important aromatic diamine, its chemical properties highlight its special value in materials science. The compound has a diamine group, which gives it excellent properties as an epoxy resin curing agent, can form a cross-linked network, and improve the thermal stability and mechanical strength of the composite. The hydroxyl group in its molecular structure makes 4,4'-Oxydianiline have a certain hydrophilicity, but also affects its reactivity and selectivity. In addition, as a weakly alkaline substance, it can undergo chemical transformation under certain conditions and participate in the synthesis of a variety of highly functional materials, such as polyamides, dyes and pharmaceutical intermediates. The chemical's stability and diversity of reactions make it an indispensable high-performance chemical ingredient in electronics, aerospace and advanced manufacturing.