215554 Sigma-Aldrich

Copper(I) iodide

99.999% trace metals basis

Synonym: Cuprous iodide

  • CAS Number 7681-65-4

  • Empirical Formula (Hill Notation) CuI

  • Molecular Weight 190.45

  •  EC Number 231-674-6

  •  MDL number MFCD00010978

  •  eCl@ss 38150105

  •  PubChem Substance ID 24852902

  •  NACRES NA.23



Related Categories Chemical Synthesis, Copper, Copper Salts, Crystal Grade Inorganics, Cu,
Quality Level   200
vapor pressure   10 mmHg ( 656 °C)
assay   99.999% trace metals basis
form   powder and chunks
bp   1290 °C/1 atm (decomp)(lit.)
mp   605 °C (lit.)
solubility   dilute aqueous acid: insoluble(lit.)
density   5.62 g/mL at 25 °C (lit.)
Featured Industry   Battery Manufacturing
SMILES string   [Cu+].[I-]
InChI   1S/Cu.HI/h;1H/q+1;/p-1



1 kg in poly bottle

25, 100 g in poly bottle

5 g in amber poly bottle


Catalyst for N-arylation of amines and amino acids; synthesis of sulfenamides.

Optimal catalyst for stereospecific and regioselective reaction of silacyclopropanes with carbonyl compounds.

Safety & Documentation

Safety Information

Signal word 
Target organs 
Respiratory system
Personal Protective Equipment 
UN 3077 9 / PGIII
WGK Germany 
Flash Point(F) 
Not applicable
Flash Point(C) 
Not applicable


Certificate of Analysis (COA)

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Certificate of Origin (COO)

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Frequently Asked Questions

Which document(s) contains shelf-life or expiration date information for a given product?
If available for a given product, the recommended re-test date or the expiration date can be found on the Certificate of Analysis.
How do I get lot-specific information or a Certificate of Analysis?
The lot specific COA document can be found by entering the lot number above under the "Documents" section.
If the purity of 99.999%for Product 215554, Copper (I) Iodide is based solely on trace metal content, then what is the chemical purity of this product?
We do not report a chemical purity for this product, however, an approximation of the purity can be determined by taking the value for the Copper content reported on the Certificate of Analysis and dividing it by the theoretical content of 33.4%. (It is a an approximation because there could be other Copper containing impurities present that may contribute to the value).
What is Product 215554, Copper (I) Iodide soluble in?
According to the 13th edition of the chemicals encyclopedia published by the Royal Society of Chemistry, it is decomposed by concentrated Sulfuric Acid and Nitric Acid, insoluble in water, practically insoluble in ethanol and dilute acids, soluble in aqueous solutions of ammonia, alkali cyanides, thiosulfates, and iodides.
Product 215554, Copper (I) Iodide has turned grayish in color. Is it still good?
This compound is light sensitive. It is cream colored when first it is first produced, then slowly turns grayish in color because of its photosensitivity. Chemical purity is not significantly compromised by modest homogeneous appearance changes.
How do I find price and availability?
There are several ways to find pricing and availability for our products. Once you log onto our website, you will find the price and availability displayed on the product detail page. You can contact any of our Customer Sales and Service offices to receive a quote. USA customers: 1-800-325-3010 or view local office numbers.
What is the Department of Transportation shipping information for this product?
Transportation information can be found in Section 14 of the product's (M)SDS.To access the shipping information for this material, use the link on the product detail page for the product.
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