Used as a key intermediate in the synthesis of high-performance flame retardants due to the presence of bromine and reactive carboxylic acid groups. Its rigid aromatic structure and double bond geometry enhance thermal stability and promote char formation in polymers. Commonly applied in engineering plastics and electronic encapsulation materials where thermal resistance and flame suppression are critical. Also investigated as a crosslinking agent in specialty resins for coatings and adhesives, leveraging its multifunctional acid groups for network formation.