Used primarily as a monomer in the synthesis of high-performance polyimides and polyesters, this compound contributes to the formation of thermally stable and mechanically robust polymers. Its rigid aromatic structure enhances the glass transition temperature and improves resistance to chemical and thermal degradation. These polymers are applied in aerospace, microelectronics, and coating industries where durability under extreme conditions is required. The anhydride groups allow for step-growth polymerization with diamines or diols, enabling tailored polymer architectures for specialty films, insulating materials, and composite matrices.