Used as a key intermediate in organic synthesis, particularly in the preparation of conjugated materials for electronic applications such as organic light-emitting diodes (OLEDs) and semiconducting polymers. Its ethynyl group enables coupling reactions like Sonogashira, while the bromomethyl group allows for further functionalization through substitution or radical reactions. Commonly employed in the construction of molecular frameworks for pharmaceuticals, agrochemicals, and liquid crystals due to its bifunctional reactivity. Also utilized in polymer chemistry to introduce aromatic ethynyl moieties into macromolecular structures.