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Cuprous iodide

Reaction Cuprous halide Physical and Chemical Properties Detecting mercuric test by cuprous iodide Uses Toxicity Using Limited Chemical Properties Production method
Cuprous iodide
Cuprous iodide structure
Chemical Name:
Cuprous iodide
CuI;Ciras;Marshite;7440/05/3;Iodocopper;Hydro-giene;Kupferiodid;Copperiodide3;Copperiodide1;Ciras Reagent
Molecular Formula:
Formula Weight:
MOL File:

Cuprous iodide Properties

Melting point:
605 °C(lit.)
Boiling point:
1290 °C
5.62 g/mL at 25 °C(lit.)
vapor pressure 
10 mm Hg ( 656 °C)
refractive index 
Flash point:
storage temp. 
Store below +30°C.
dilute aqueous acid: insoluble(lit.)
Specific Gravity
White to Pale Brown
Water Solubility 
Air & Moisture Sensitive
Solubility Product Constant (Ksp)
pKsp: 11.9
CAS DataBase Reference
7681-65-4(CAS DataBase Reference)
NIST Chemistry Reference
Copper(I) iodide(7681-65-4)
EPA Substance Registry System
Copper iodide (CuI)(7681-65-4)
  • Risk and Safety Statements
  • Hazard and Precautionary Statements (GHS)
Hazard Codes  Xn,N,Xi
Risk Statements  22-36/37/38-50/53
Safety Statements  22-24/25-26-61-57-37/39-29
RIDADR  UN 3077 9/PG 3
WGK Germany  3
HazardClass  9
HS Code  28276000
Hazardous Substances Data 7681-65-4(Hazardous Substances Data)
Signal word: Danger
Hazard statements:
Code Hazard statements Hazard class Category Signal word Pictogram P-Codes
H302 Harmful if swallowed Acute toxicity,oral Category 4 Warning P264, P270, P301+P312, P330, P501
H315 Causes skin irritation Skin corrosion/irritation Category 2 Warning P264, P280, P302+P352, P321,P332+P313, P362
H317 May cause an allergic skin reaction Sensitisation, Skin Category 1 Warning P261, P272, P280, P302+P352,P333+P313, P321, P363, P501
H318 Causes serious eye damage Serious eye damage/eye irritation Category 1 Danger P280, P305+P351+P338, P310
H319 Causes serious eye irritation Serious eye damage/eye irritation Category 2A Warning P264, P280, P305+P351+P338,P337+P313P
H335 May cause respiratory irritation Specific target organ toxicity, single exposure;Respiratory tract irritation Category 3 Warning
H400 Very toxic to aquatic life Hazardous to the aquatic environment, acute hazard Category 1 Warning P273, P391, P501
H410 Very toxic to aquatic life with long lasting effects Hazardous to the aquatic environment, long-term hazard Category 1 Warning P273, P391, P501
Precautionary statements:
P261 Avoid breathing dust/fume/gas/mist/vapours/spray.
P280 Wear protective gloves/protective clothing/eye protection/face protection.
P304+P340 IF INHALED: Remove victim to fresh air and Keep at rest in a position comfortable for breathing.
P305+P351+P338 IF IN EYES: Rinse cautiously with water for several minutes. Remove contact lenses, if present and easy to do. Continuerinsing.
P405 Store locked up.

Cuprous iodide price More Price(22)

Manufacturer Product number Product description CAS number Packaging Price Updated Buy
Sigma-Aldrich 03140 Copper(I) iodide purum, ≥99.5% 7681-65-4 100g $143 2018-11-13 Buy
Sigma-Aldrich 03140 Copper(I) iodide purum, ≥99.5% 7681-65-4 1kg $514 2018-11-13 Buy
Alfa Aesar 011606 Copper(I) iodide, 98% 7681-65-4 250g $72.3 2018-11-16 Buy
Alfa Aesar 011606 Copper(I) iodide, 98% 7681-65-4 1kg $254 2018-11-16 Buy
Strem Chemicals 29-0485 Copper(I) iodide (99.999%-Cu) PURATREM 7681-65-4 10g $48 2018-11-13 Buy

Cuprous iodide Chemical Properties,Uses,Production


Copper catalyst/base admixture useful for screening reactions involving the N-arylation of nitrogen-containing heterocycles.

Cuprous halide

Cuprous Iodide and cuprous chloride, cuprous bromide are three common cuprous halides, three are white solid, the photonasty of cuprous iodide is worse than CuBr and CuCl, in light decomposition and precipitation of iodine. In nature, it exists in marshite. Cuprous chloride and cuprous bromide can be produced by the reaction of the corresponding acidic solution of divalent copper salt with copper. Cuprous Iodide was prepared by adding Cu2 + into potassium iodide solution.
Cuprous iodide and Magnesium bromide or lithium phenyl in ether can produce copper phenyl.
The reaction of methyl lithium with cuprous iodide at-15 ℃ or by the reaction of copper nitrate and tetramethyl lead in ethanol at-60 ~-40 ℃ can produce methyl copper.
Grignard reagent reacts with cuprous halide to produce cuprous hydrocarbyl, cuprous halide may be cuprous iodide, cuprous bromide, cuprous chloride.
Reaction formula
The above information is edited by the chemicalbook of Yan Yanyong.

Physical and Chemical Properties

Chemical formula is CuI. The molecular weight is 190.45. White cubic crystal or white powder, toxic. The relative density is 5.62, melting point is 605 ℃, boiling point is 1290 ℃. Stable to light and air. Cuprous iodide is almost insoluble in water and ethanol, soluble in liquid ammonia, dilute hydrochloric acid, potassium iodide, potassium cyanide or sodium thiosulfate solution, can be c decomposed by oncentrated sulfuric acid and concentrated nitric acid. The acidic solution of copper sulfate is added excess potassium iodide or under stirring, a mixed solution of potassium iodide and sodium thiosulfate was added dropwise to a solution of copper sulfate, to obtain precipitation of cuprous iodide. In addition to general purpose use as reagents, etc., but also can be used as power-iodide thermal paper conductive layer material, medical sterilization, mechanical bearing temperature agent, but also used for analysis of trace mercury.
Toxicity: Prolonged and repeated contact with the body is harmful, should avoid direct contact with the body. Ingestion is great harm to the body.

Detecting mercuric test by cuprous iodide

Mercury is widely used in various types of industrial instruments, mirror, chemical and metallurgy. West Lik Sang, Saili scattered, Gu Ren music students and other organic mercury common are used in agriculture as seed disinfectants and insecticides. In pharmaceutical, Mercury preparation and the use of mercury Mercuric chloride, calomel, mercury and other benefits withdrawal are used as disinfection, germicides, mercury also can make treatment medication such as diuretics.
And mercury compounds are toxic, such as eating and careless use can cause poisoning.
[principle] After the sublimation of mercury, then it interacts with copper iodide, generating red complex of mercury iodide. This method can be detected 3μg mercury.
Detecting mercuric iodide reaction equation: 2Cu2I2 + HgHgCu2I4 + 2Cu
[Reagents] Cotton cuprous iodide: 5g of copper sulfate, 3g of anhydrous ferrous sulfate, dissolved in 100mL of water, were added a solution of iodide (7g of potassium iodide was dissolved in 50mL water) with stirring, centrifuged the resulting cuprous iodide to precipitation of cuprous iodide, after washing, it was stirred into a cloudy liquid, absorbent cotton impregnated with this solution is cloudy dry for spare.
[Operation] Copper is set in test tubes by Leiyin Xi's method, iodide cotton gently cover the spout. The bottom of the tube is in the direct fire heating, if the presence of mercury, cotton turns red, at the same time conduct blank control.
Also sample 1 drop of digestive juice, applying to cotton cuprous iodide, if present of mercury, cotton turns red.
Reference: in Wiesen, high Ru Qin, Jin Xiaomei editor, common chemical food poisoning rapid disposal technologies.


1. Cuprous iodide is so widely used as catalyst in organic synthesis, resin modifier, artificial rainfall agents, cathode ray tube cover, as well as sources of iodine in iodized salt. In the presence of 1,2-or 1,3-diamine ligand, cuprous iodide can catalyze reaction of aryl bromide, vinyl bromide and brominated heterocyclic compound converting to the corresponding iodide. The reaction is generally in dioxane solvent, and sodium iodide is used as iodide reagents. Aromatic iodide general is more lively than the corresponding chloride and iodide, therefore, iodide can catalyze a series of reactions involved in coupling a halogenated hydrocarbon, for example, Heck reaction, Stille reaction, Suzuki reaction and the Ullmann reaction. In the present of dichloro bis (triphenylphosphine) palladium (II), cuprous chloride and diethylamine, 2-bromo-1-octen-3-ol with 1-Nonyl acetylene coupling reaction to produce 7-sub-8-hexadecene-6-ol.
2. used as a catalyst for organic reactions, cathode ray tube covering, also used as animal feed additives, etc. copper iodide and mercuric iodide may also be used together as the indicator of measuring rising temperature of mechanical bearing.
3. as a catalyst in many reactions involved in the Grignard reagent, the cuprous iodide can also be in dry Wiff rearrangement reaction.



Using Limited


Chemical Properties

Pure white crystalline powder. Dissolved in water.

Production method

Derived by the reaction of copper sulfate and potassium iodide under weakly acidic conditions.

Chemical Properties

White to grey or tan powder


Copper (I) Iodide used in the preparation of alkynyl imines and the synthesis of pyrroles and pyrrole heterocycles. It is also used in the synthesis of BTBT derivatives ([1]Benzothieno[3,2-b]benzothio phene) for use as semiconductors in transistors.


A catalyst for N-arylation of amines and amino acids


As catalyst in organic reactions; as ice-nucleating chemical; as coating in cathode-ray tubes; as source of iodine in animal feeds; with HgI2 as tempereture indicator; bactericide.

General Description

Odorless tan or off-white solid. Sinks in water.

Reactivity Profile

Cuprous iodide has weak oxidizing or reducing powers. Redox reactions can however still occur. The majority of compounds in this class are slightly soluble or insoluble in water. If soluble in water, then the solutions are usually neither strongly acidic nor strongly basic. These compounds are not water-reactive.



Health Hazard

Inhalation causes irritation of nose and throat. Ingestion of copper salts produces violent vomiting and purging, intense pain, collapse, coma, convulsions, and paralysis. Contact with eyes or skin causes irritation.

Fire Hazard

Special Hazards of Combustion Products: Irritating hydrogen iodide or iodine vapors may form in fire.

Purification Methods

It can be freshly prepared by dissolving an appropriate quantity of CuI in boiling saturated aqueous NaI over 30minutes. Pure CuI is obtained by cooling and diluting the solution with water, followed by filtering and washing sequentially with H2O, EtOH, EtOAc, Et2O and pentane, then drying in vacuo for 24hours [Dieter, J Am Chem Soc 107 4679 1985]. Alternatively wash it with H2O, then EtOH and finally with Et2O containing a little iodine. Traces of H2O are best removed first by heating at 110o and then at 400o. Exess of I2 is removed completely at 400o. It dissolves in Et2O if an amine is present to form the amine complex. On heating it becomes red, then black, but changes to white on cooling. It is sparingly soluble in H2O or alkali iodide solutions but readily soluble in NH3 (which absorbs CO) and in cyanide or thiosulfate solutions. [Glemser & Sauer in Handbook of Preparative Inorganic Chemistry (Ed Brauer) Academic Press Vol II p 1007 1965, Bawn & Ledwith Chem Ind (London) 1180 1957.]

Cuprous iodide Preparation Products And Raw materials

Raw materials

Preparation Products

Cuprous iodide Suppliers

Global( 296)Suppliers
Supplier Tel Fax Email Country ProdList Advantage
Hubei xin bonus chemical co. LTD
13657299721 CHINA 17424 58
Henan DaKen Chemical CO.,LTD.
+86-371-55531817 CHINA 21956 58
Henan Tianfu Chemical Co.,Ltd.
0371-55170693 CHINA 20676 55
Mainchem Co., Ltd.
+86-0592-6210733 CHINA 32452 55
Anhui Royal Chemical Co., Ltd.
+86-025-86736275 CHINA 488 55
Xiamen AmoyChem Co., Ltd
+86 (0)592-605 1114 CHINA 6374 58
career henan chemical co
+86-371-86658258 CHINA 25796 58
Chemwill Asia Co.,Ltd.
86-21-51861608;;; CHINA 23959 58
Hubei Jusheng Technology Co.,Ltd.
86-188-71490254 CHINA 20084 58
Haihang Industry Co.,Ltd
+86 531 8582 1093 CHINA 8266 58

View Lastest Price from Cuprous iodide manufacturers

Image Release date Product Price Min. Order Purity Supply Ability Manufacturer
2018-12-20 Cuprous iodide
US $1.00 / kg 1kg 99% Customized career henan chemical co

Cuprous iodide Spectrum

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