3,4'-Oxydiphthalic anhydride is primarily used in the synthesis of high-performance polymers, particularly polyimides. These polymers are valued for their exceptional thermal stability, mechanical strength, and chemical resistance, making them suitable for applications in the electronics industry. For instance, they are used as insulating materials in electronic devices, flexible printed circuits, and semiconductor coatings. Additionally, this compound is employed in the production of advanced adhesives and coatings that require durability under extreme conditions, such as in aerospace and automotive industries. Its role in creating heat-resistant films and fibers further extends its utility in industrial and engineering applications.