Used as a key intermediate in the synthesis of pharmaceuticals and agrochemicals, particularly in reactions where the ethynyl group enables coupling processes such as Sonogashira or Glaser couplings. Its dichloro-substituted aromatic ring allows for selective substitution reactions, making it valuable in the development of complex organic molecules. Commonly employed in the production of liquid crystals, functional materials, and conjugated polymers for electronic applications due to its ability to link into extended π-systems. Also utilized in research for building covalent organic frameworks (COFs) and other porous materials.