Used as a key intermediate in organic synthesis, particularly in the preparation of fluorinated pharmaceuticals and agrochemicals. Its ethynyl group enables coupling reactions such as Sonogashira, allowing construction of conjugated systems for optoelectronic materials. Also employed in the development of fluorescent probes and dyes due to the naphthalene core’s photophysical properties. The presence of fluorine enhances metabolic stability in bioactive molecules, making it valuable in medicinal chemistry for designing drug candidates with improved pharmacokinetics.