Used as a catalyst in organic synthesis, particularly in click chemistry reactions such as the copper-catalyzed azide-alkyne cycloaddition (CuAAC), which forms 1,2,3-triazoles. It serves as a source of copper(I) ions in reactions requiring mild and selective conditions. Also applied in materials science for constructing conductive polymers and metal-organic frameworks (MOFs) due to its ability to link metal centers with organic ligands. Its acetylide group enables use in carbon-carbon bond-forming reactions and in the preparation of nanostructured copper-containing materials.