Used as a catalyst in coupling reactions such as Ullmann and Glaser reactions for forming carbon-carbon bonds in organic synthesis, improving efficiency and selectivity. Acts as a source of iodide ions and copper in semiconductor material preparation. Employed in cloud seeding for weather modification due to its ability to promote ice nucleation. Utilized in thin-film electronics for devices like perovskite solar cells, organic light-emitting diodes (OLEDs), LEDs, and photovoltaics as a hole-transport layer owing to its electrical conductivity and photostability. Also used in medical applications to prevent iodine deficiency and in animal feed supplements as a source of copper and iodine to support growth.