Used as a key intermediate in the synthesis of pharmaceuticals and agrochemicals, particularly in the production of selective herbicides and fungicides. Its ethynyl and chloro functional groups allow for versatile coupling reactions, making it valuable in building complex organic molecules. Commonly employed in cross-coupling reactions such as Sonogashira and Suzuki reactions to form carbon-carbon bonds in fine chemical manufacturing. Also utilized in the development of liquid crystals and organic semiconductors due to its rigid aromatic structure and ability to modify electronic properties.