Used as a high-performance polymer building block in the synthesis of advanced engineering plastics and specialty resins. Its rigid aromatic structure and chlorine substituents enhance thermal stability and chemical resistance, making it suitable for applications in aerospace, electronics, and industrial coatings. It is also employed in the development of liquid crystalline materials and as a cross-linking agent in high-temperature composite systems. Due to its hydrophobic and sterically hindered framework, it contributes to improved mechanical strength and oxidative stability in polymeric networks.