Widely used as a catalyst in organic synthesis, particularly in coupling reactions such as C–N, C–O, and C–S bond formations. It is effective in facilitating the formation of carbon-heteroatom bonds under mild conditions, making it valuable in pharmaceutical and fine chemical manufacturing. Its high reactivity and stability allow for efficient transformations in the synthesis of complex molecules, including drug intermediates and functional materials. Also employed in click chemistry, especially in azide-alkyne cycloaddition reactions, where it acts as a source of copper(I) to promote regioselective triazole formation.