Copper Iodide, Purity : 99.98, Einecs No. : 231-674-6, CAS No. : 7681-65-4

Copper(I) iodide, also known as cuprous iodide, is an inorganic compound with the chemical formula CuI. It appears as a white solid, though it may appear tan or reddish brown due to impurities. This compound is notable for its various applications in fields ranging from organic synthesis to cloud seeding and serves as a source of dietary iodine in animal feed and table salt2.

Copper(I) iodide exhibits a rich phase diagram, existing in several crystalline forms depending on temperature:

• γ-CuI: Zinc blende structure (below 390 °C)
• β-CuI: Wurtzite structure (between 390 °C and 440 °C)
• α-CuI: Rock salt structure (above 440 °C)

The Cu-I bond length in the zinc blende or wurtzite structures is approximately 2.338 Å, and the compound is characterized as a p-type semiconductor1.

Copper(I) iodide has several important uses:

• Organic Synthesis: Acts as a reagent in various chemical reactions.
• Cloud Seeding: Utilized to induce precipitation.
• Stabilizer: Used to stabilize heat in nylon and other polymers.
• Nutritional Supplement: Serves as a source of iodine in animal feed and table salt.
• Catalyst and Bactericide: Employed in various industrial processes, including photographic processing and oil drilling3