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Chlorides and other halides

Cuprous iodide

Also known as Copper(1+) iodide, Hydro-Giene, Marshite

CAS 7681-65-4Formula CuIMolar mass 190.45 g/molEC 231-674-6
50 suppliers listed Drug substance
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Cuprous iodide chemical structure, CuI, CAS 7681-65-4
2D chemical structure

Key facts

What buyers check first

All properties
Appearance
Dense powder or cubic crystals (zinc blende structure)
Melting point
606 °C
Boiling point
Ca. 1290 °C
Density
5.67
Solubility
Insoluble in dilute acid solutions
HS code
282760
Category
Chlorides and other halides
Illustrative photo, closed white HDPE bottles and amber jars on a laboratory bench
Typical packagingIllustrative packaging image, not the actual product

What is Cuprous iodide?

Plain description, key identifiers and synonyms

Cuprous iodide is a chemical substance with the molecular formula CuI and a molar mass of 190.45 g/mol. Its CAS registry number is 7681-65-4. The IUPAC name is copper(1+) iodide.

Identifiers

Registry numbers, names and line notations, tap to copy

IUPAC name
copper(1+) iodide
CAS number
7681-65-4 CAS number cross-checked
EC number
231-674-6
Molecular formula
CuI
UNII
7DE9CA6IL2
INCI name
CUPROUS IODIDE
InChIKey
LSXDOTMGLUJQCM-UHFFFAOYSA-M
InChI
InChI=1S/Cu.HI/h;1H/q+1;/p-1
SMILES (canonical and isomeric)
[Cu+].[I-]

Synonyms

  • Copper(1+) iodide
  • Hydro-Giene
  • Marshite
  • Copper monoiodide
  • Copper iodide (cui)
  • Natural marshite
  • Cuprum Iodatum
  • Copper (I) iodide
  • Copper(I) iodide
  • iodocopper
  • Copper(l)iodide
  • small es, Cyrillicopper monoiodide
  • CuI
  • Copper(l) iodide
  • Copper iodide (9CI, ACI)
  • Cuprous iodide,1335-23-5

Physical and chemical properties

Measured values and descriptors computed from the structure

Physical and chemical properties

Measured values, check the supplier specification for your grade

Appearance
Dense powder or cubic crystals (zinc blende structure)exp.
Melting point
606 °Cexp.
Boiling point
Ca. 1290 °Cexp.
Density
5.67exp.
Solubility
Insoluble in dilute acid solutionsexp.
Vapour pressure
10 MM HG @ 656 °Cexp.

Values vary by grade. Ask suppliers for the COA or TDS of the batch you buy.

Computed descriptors

Calculated from the structure, useful for screening and formulation

Molecular weight
190.45 g/molcalc.
Exact mass
189.8341 Dacalc.
LogP (octanol/water)
-3calc.
Topological polar surface area
0 Ųcalc.
Hydrogen bond donors
0calc.
Hydrogen bond acceptors
0calc.
Rotatable bonds
0calc.
Heavy atoms
2calc.
Rings
0calc.
Aromatic rings
0calc.
Fraction sp3 carbons
0calc.
Formal charge
0calc.
Stereocentres
0calc.
Components
2calc.

Calculated for screening. Confirm critical figures with the supplier.

Safety and hazards

GHS classification summary, not a safety data sheet

No GHS hazard classification is recorded for this substance yet. That does not mean it is harmless.

GHS classification summary, not a safety data sheet (SDS). Classifications can differ by supplier, grade and concentration. Always check the supplier's SDS.

Cuprous iodide suppliers

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All 50 suppliers
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Where suppliers are based

50 suppliers in 12 countries

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Cuprous iodide price

Indicative price range per kg from live supplier offers

No published prices right now

Suppliers quote this chemical on request. Send one free request and compare quotes side by side.

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Uses and applications

What the substance is used for, by industry and function

As catalyst in org reactions, as ice-nucleating chemical, as coating in cathode-ray tubes, as source of iodine in animal feeds, with mercuric iodide as temp indicator.

Nutrient &/or dietary supplement food additive, trace amt added to animal feeds.

Feed additive, in table salt as source of dietary iodine (up to 0.01%), catalyst, cloud seeding.

Plastics -> Typical concentration range in plastic materials -> 0.5%.

Industrial uses: Heat stabilizer, Ion exchange agent, Catalyst, Other.

Use classes: Plastics.

Cosmetic ingredient, INCI name CUPROUS IODIDE(antimicrobial, deodorant)

Functional uses

  • Biocide
  • Deodorizer
  • Stabilizing agent

Cosmetic functions

  • Antimicrobial
  • Deodorant

How it is made

Interaction of solutions of potassium iodide and copper sulfate.

Manufactured pyrometallurgically by the reaction of hot copper with iodine vapor. Alternatively, copper(II) salt solutions are reacted with alkali iodides to precipitate copper(I) iodide.

Regulatory status

Inventories, regulations and trade controls that list this substance

Health and food

  • EU cosmetic ingredient inventory
  • Active ingredient in FDA approved drug labels

United States

  • TSCA inventory (USA)
    Status: Active in US commerce

HS code and trade data

Customs classification and reported world trade statistics

Global trade

World import and export statistics for the HS code Cuprous iodide is traded under.

HS 2827.60Indicative HS code

Iodides and iodide oxides

World exports in 2024
$389M
+14.6% vs 2023, imports $381M
2019 to 2024
Top exporters
  1. Japan17.1%
  2. Chile17.0%
  3. India * partner reported12.8%
Top importers
  1. China28.9%
  2. Germany14.7%
  3. South Korea9.1%

* Partner reported figures, a lower bound.

Reported customs values in USD, not prices.Full trade data

The HS code shown for Cuprous iodide is indicative (it was assigned by structure rules). Confirm the classification with your customs broker before shipping.

Frequently asked questions

Quick answers about Cuprous iodide, based on the data on this page

What is Cuprous iodide?

Cuprous iodide is a chemical substance with the molecular formula CuI and a molar mass of 190.45 g/mol. Its CAS registry number is 7681-65-4. The IUPAC name is copper(1+) iodide.

What is the CAS number of Cuprous iodide?

The CAS registry number of Cuprous iodide is 7681-65-4.

What is the molecular formula and weight of Cuprous iodide?

The molecular formula of Cuprous iodide is CuI and its molar mass is 190.45 g/mol.

What is Cuprous iodide used for?

As catalyst in org reactions, as ice-nucleating chemical, as coating in cathode-ray tubes, as source of iodine in animal feeds, with mercuric iodide as temp indicator. Nutrient &/or dietary supplement food additive, trace amt added to animal feeds.

Is Cuprous iodide hazardous?

No GHS hazard classification for Cuprous iodide is recorded on CompoundList yet. That does not prove it is safe. Always read the supplier safety data sheet.

What is the HS code of Cuprous iodide?

Cuprous iodide is usually classified under HS code 282760 (Iodides and iodide oxides). This is indicative, confirm it with your customs broker before shipping.

Where can I buy Cuprous iodide?

CompoundList lists 50 suppliers of Cuprous iodide in China, India, United States, Germany and 8 more. Send one free request to get and compare quotes. Your contact details stay private until you accept a quote.

Where can I buy Cuprous iodide in India?

10 suppliers in India list Cuprous iodide on CompoundList. Filter the suppliers list by country and send a request to compare prices, grades and delivery times.

What is the price of Cuprous iodide?

Suppliers quote Cuprous iodide on request because prices depend on grade, purity, quantity and destination. A free request on CompoundList gets you several quotes to compare.

Guides for buyers

Practical guides that help when you source, ship or handle Cuprous iodide

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Data last updated 7 Oct 2026. Details may have changed, please confirm them with the supplier. Report an error on this page
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