Copper(I) iodide
General
Systematic name	Copper(I) iodide
Other names	Cuprous iodide
Molecular formula	CuI
Molar mass	190.45 g/mol
Appearance	Off white powder
CAS number	[7681-65-4]
Properties
Density and phase	5.62 g/cm3, solid
Solubility in water	Insoluble
Melting point	605 °C (878 K)
Boiling point	1290 °C (1573 K)
Structure
Coordination geometry	Linear
Crystal structure	Cubic close packed
Dipole moment	? D
Hazards
MSDS	External MSDS
Main hazards	?
NFPA 704
Flash point	? °C
R/S statement	R: 36/37/38 S: 24/25
RTECS number	?
Supplementary data page
Structure and properties	n, εr, etc.
Thermodynamic data	Phase behaviour Solid, liquid, gas
Spectral data	UV, IR, NMR, MS
Related compounds
Other anions	Copper(I) chloride Copper(I) hydroxide
Other cations	Copper(II) iodide Sodium iodide
Related catalysts	?
Related compounds	Nylon
Except where noted otherwise, data are given for materials in their standard state (at 25 °C, 100 kPa) Infobox disclaimer and references

The chemical compound copper(I) iodide has the formula CuI, more commonly known as cuprous iodide. Copper(I) iodide, an off white powder, is found in nature as mineral marshite, a redish brown crystal.¹ Image File history File linksMetadata Copper(I)_iodide. ... IUPAC nomenclature is a system of naming chemical compounds and of describing the science of chemistry in general. ... A chemical formula (also called molecular formula) is a concise way of expressing information about the atoms that constitute a particular chemical compound. ... Molar mass is the mass of one mole of a chemical element or chemical compound. ... CAS registry numbers are unique numerical identifiers for chemical compounds, polymers, biological sequences, mixtures and alloys. ... Density (symbol: ρ - Greek: rho) is a measure of mass per unit of volume. ... 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The debye (symbol: D) is a non-SI and non-CGS unit of electrical dipole moment. ... A material safety data sheet or MSDS is a form containing data regarding the properties of a particular substance. ... Worker safety and health is the prevention and reduction of the number of occupational safety and health hazards at the places of employment, providing safe and healthful working conditions. ... NFPA 704 is a standard maintained by the U.S. National Fire Protection Association. ... Image File history File links File history Legend: (cur) = this is the current file, (del) = delete this old version, (rev) = revert to this old version. ... Image File history File links File history Legend: (cur) = this is the current file, (del) = delete this old version, (rev) = revert to this old version. ... Image File history File links File history Legend: (cur) = this is the current file, (del) = delete this old version, (rev) = revert to this old version. ... The flash point of a fuel is the lowest temperature at which it can form an ignitable mix with air. ... Risk and Safety Statements, also known as R/S statements, R/S numbers, R/S phrases, and R/S sentences, is a system of hazard codes and phrases for labeling dangerous chemicals and compounds. ... R-phrases are defined in Annex III of European Union Directive 67/548/EEC: Nature of special risks attributed to dangerous substances and preparations. ... S-phrases are defined in Annex IV of European Union Directive 67/548/EEC: Safety advice concerning dangerous substances and preparations. ... RTECS, also known as Registry of Toxic Effects of Chemical Substances, is a database of toxicity information compiled from the open scientific literature that is available for charge. ... The refractive index of a material is the factor by which the phase velocity of electromagnetic radiation is slowed relative to vacuum. ... The dielectric constant εr (represented as or K in some cases) is defined as the ratio: where εs is the static permittivity of the material in question, and ε0 is the vacuum permittivity. ... Ultraviolet-Visible Spectroscopy or Ultraviolet-Visible Spectrophotometry (UV/ VIS) involves the spectroscopy of photons (spectrophotometry). ... IR spectrum of a thin film of liquid ethanol. ... Nuclear Magnetic Resonance Spectroscopy most commonly known as NMR Spectroscopy is the name given to the technique which exploits the magnetic properties of nuclei. ... It has been suggested that Mass spectrum be merged into this article or section. ... // An ion is an atom, group of atoms, or subatomic particle with a net electric charge. ... Copper(I) chloride (quite commonly called cuprous chloride), is the lower chloride of copper, with the formula CuCl. ... // An ion is an atom, group of atoms, or subatomic particle with a net electric charge. ... Sodium iodide (NaI) is used in polymerase chain reactions (PCR) Categories: Chemistry stubs ... A catalyst (Greek: καταλύτης, catalytÄ“s) is a substance that accelerates the rate (speed) or ease of a chemical reaction (see also catalysis) without itself being changed at the end of the chemical reaction . ... Nylon represents a family of synthetic polymers, a thermoplastic material, invented in 1935 by Wallace Carothers at DuPont. ... In chemistry, the standard state of a material is its state at 1 bar (100 kilopascals) and 25 degrees Celsius (298. ... A chemical compound is a chemical substance formed from two or more elements, with a fixed ratio determining the composition. ...

Structure

Preparation

In the laboratory, copper(I) Iodide is prepared by simply mixing aqueous solutions of sodium or potassium iodide with soluble copper(II) salt such copper sulfate.

Cu²⁺ + 2I^1- → CuI₂ + 2 K⁺

The CuI₂ rapidly decomposed to iodine and insoluble copper(I) iodide.¹ 2 CuI₂ → 2 CuI + I₂ Copper(I) Iodide can also prepared by heating iodine and copper in concentrated hydriodic acid,HI.¹

Uses

CuI is used as a heat stabilizer for nylon as well as a reagent in organic synthesis. CuI is used as a source of dietary iodine in table salt and animal feed. CuI is used in cloud seeding. CuI is used to coat cathode ray tubes. CuI is used to indicate temperature. CuI is used as a catalyst in organic reactions.¹ Nylon represents a family of synthetic polymers, a thermoplastic material, invented in 1935 by Wallace Carothers at DuPont. ... Organic synthesis is the construction of organic molecules via chemical processes. ...

External links

• Chemicalland properties database
• National Pollutant Inventory - Copper and compounds fact sheet

References

1. Patnaik,P. Handbook of Inorganic Chemicals. McGraw-Hill, (2003). p 268.

Marshall, J. A.; Sehon, C. A. "Isomerization of β-alkynyl Allylic Alcohols to Furans Catalyzed by Silver Nitrate on Silica Gel: 2-Pentyl-3-Methyl-5-Heptylfuran [Furan, 5-heptyl-3-methyl-2-pentyl- ]"Organic Syntheses, Vol. 76, p.263 (Coll. Vol. 10, p.599). CuI-promoted acetylide-vinyl halide coupling.