Used as a crosslinking agent in polymer chemistry, particularly in the synthesis of conjugated microporous polymers and covalent organic frameworks. Its multiple bromomethyl groups enable efficient functionalization and network formation through reactions with nucleophiles or metal-catalyzed couplings. Commonly employed in the preparation of porous materials for gas storage, catalysis, and optoelectronic applications due to its rigid aromatic structure and high reactivity. Also serves as a building block in organic synthesis for constructing complex molecular architectures via step-growth polymerization or multicomponent reactions.