Copper(ii) iodide


Copper(ii) iodide. Copper iodide (CuI2) is a compound of copper and iodine. It is a dark brown solid that melts at 240 °C (464 °F). It is insoluble in water but soluble in organic solvents. It is used as a reagent in organic synthesis and as a catalyst for the iodination of aromatic compounds.

Copper iodide finds use in many areas, including:

  • A reagent in organic synthesis
  • A catalyst for the iodination of aromatic compounds
  • An additive in welding rods to improve their mechanical properties
  • A component of some antifouling paints
  • A fire retardant
  • A photosensitive material in lithography Copper iodide is usually prepared by iodine reaction with copper(II) oxide or copper(II) hydroxide.

2 CuO + I2 → 2 CuI2

Cu(OH)2 + I2 → 2CuI2 + H2O

It can also be prepared by reducing copper(II) iodide with zinc.

2 Zn + CuI2 → 2 Cu + ZnI2

Copper iodide can also be prepared by directly reacting with iodine and copper metal.

Cu + I2 → CuI2

Uses: Copper iodide finds use in many areas, including as a reagent in organic synthesis, a catalyst for the iodination of aromatic compounds, an additive in welding rods to improve their mechanical properties, a component of some antifouling paints, and a fire retardant, and a photosensitive material in lithography. It is also used as an insecticide.

Copper iodide is used as an insecticide. It kills insects by contact and ingestion. Copper iodide is also used as a fire retardant. When added to materials, it increases their resistance to fire.

Some other uses for copper iodide include:

  • As an additive in welding rods to improve their mechanical properties
  • As a component of some antifouling paints
  • As a photosensitive material in lithography

Copper(II) iodide is a chemical compound. Its chemical formula is CuI2. It is a dark red or brown powder that is insoluble in water.

Copper(II) iodide is used as a catalyst in various reactions. It is also used in photography, as an antifouling agent, and in the manufacture of dyes and pigments.

Copper(II) iodide is harmful if swallowed, inhaled, or absorbed through the skin. Symptoms of exposure may include irritation of the eyes, nose, throat, and skin. If swallowed, it may cause vomiting and diarrhea. Inhaling it may cause coughing and difficulty breathing. Absorption through the skin may cause itching and rash. Severe exposure may result in death.

Copper(II) iodide should be stored in a cool, dry place, out of reach of children and pets. It should not be used near open flames or exposed to heat or direct sunlight.


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