Used as a key intermediate in the synthesis of pharmaceuticals and fine chemicals, particularly in the development of liquid crystal materials and organic semiconductors. Its ethynyl group enables coupling reactions, such as Sonogashira cross-coupling, allowing the construction of conjugated systems important in optoelectronic devices. Also employed in research for fabricating metal-organic frameworks (MOFs) and functionalized polymers due to its reactive alkyne functionality and ester group, which can be further modified.