Used as a key intermediate in the synthesis of high-performance polymers, particularly polyetherimides and polyetherketones, which exhibit excellent thermal stability, mechanical strength, and chemical resistance. Commonly found in aerospace, electronics, and automotive industries for manufacturing durable components. Also serves as a building block in the production of flame-retardant materials and specialty resins. Shows potential in the development of advanced membranes for gas separation and fuel cells due to its rigid structure and thermal resilience.