Used as a catalyst in various organic reactions, particularly in coupling reactions such as the Ullmann reaction, where it facilitates the formation of carbon-carbon bonds. Employed in the synthesis of acrylates and other industrial chemicals. Acts as a reagent in the preparation of organocopper compounds, which are valuable in pharmaceutical and fine chemical manufacturing. Utilized in electroless copper plating processes for printed circuit boards due to its ability to reduce and deposit metallic copper. Also applied in gas absorption to remove carbon monoxide from gas mixtures, and in some cases, as a fungicide or wood preservative.