MilliporeSigma
All Photos(1)

Documents

241741

Sigma-Aldrich

Copper(II) oxide

ACS reagent, ≥99.0%

Sign Into View Organizational & Contract Pricing

Synonym(s):
Cupric oxide
Empirical Formula (Hill Notation):
CuO
CAS Number:
Molecular Weight:
79.55
EC Number:
MDL number:
PubChem Substance ID:

grade

ACS reagent

Quality Level

Assay

≥99.0%

form

powder

reaction suitability

reagent type: catalyst
core: copper

impurities

Free alkali, passes test
≤0.002% N compounds
≤0.01% C compounds
≤0.02% S compounds
≤0.02% insol. dil. HCl

anion traces

chloride (Cl-): ≤0.005%
sulfate (SO42-): ≤0.02%

cation traces

Ca: ≤0.01%
Fe: ≤0.05%
K: ≤0.02%
Na: ≤0.05%

SMILES string

[Cu]=O

InChI

1S/Cu.O

InChI key

QPLDLSVMHZLSFG-UHFFFAOYSA-N

Looking for similar products? Visit Product Comparison Guide

Compare Similar Items

View Full Comparison

Show Differences

1 of 4

This Item
310433450804203130
Copper(II) oxide ACS reagent, ≥99.0%

Sigma-Aldrich

241741

Copper(II) oxide

Essential Grade
Copper(II) oxide needles, mixture of CuO and Cu2O, ACS reagent

Sigma-Aldrich

310433

Copper(II) oxide

Essential Grade
Copper(II) oxide powder, 99.995% trace metals basis

Sigma-Aldrich

450804

Copper(II) oxide

-
Copper(II) oxide 99.999% trace metals basis

Sigma-Aldrich

203130

Copper(II) oxide

-
assay

≥99.0%

assay

-

assay

99.995% trace metals basis

assay

99.999% trace metals basis

form

powder

form

needles

form

powder

form

powder

impurities

Free alkali, passes test, ≤0.002% N compounds, ≤0.01% C compounds, ≤0.02% S compounds, ≤0.02% insol. dil. HCl

impurities

≤0.002% C compounds, ≤0.002% N compounds

impurities

-

impurities

-

anion traces

chloride (Cl-): ≤0.005%, sulfate (SO42-): ≤0.02%

anion traces

sulfate (SO42-): ≤0.012%

anion traces

-

anion traces

-

cation traces

Ca: ≤0.01%, Fe: ≤0.05%, K: ≤0.02%, Na: ≤0.05%

cation traces

C: ≤0.002%, N: ≤0.002%

cation traces

-

cation traces

-

General description

Copper (II) oxide is one of the two stable oxides of copper. Cupric oxide is a precursor to many copper-containing products and chemicals. It is used as a pigment, fungicide, and antirust protection agent for marine paints. CuO possesses notable and admirable characteristics like abundance and affordability, ease of manufacturing, scalability, non-toxicity, antioxidant properties, and semiconducting characteristics.

Application

Copper (II) oxide is used:,As a catalyst in the synthesis of 2-Aryl- and 2-alkenyl-1,3,4-oxadiazoles from treating 1,3,4-oxadiazoles with aryl or alkenyl halides.

Pictograms

Environment

Signal Word

Warning

Hazard Statements

Precautionary Statements

Hazard Classifications

Aquatic Acute 1 - Aquatic Chronic 1

Storage Class Code

13 - Non Combustible Solids

WGK

WGK 3

Flash Point(F)

Not applicable

Flash Point(C)

Not applicable


Certificates of Analysis (COA)

Search for Certificates of Analysis (COA) by entering the products Lot/Batch Number. Lot and Batch Numbers can be found on a product’s label following the words ‘Lot’ or ‘Batch’.

Already Own This Product?

Documents related to the products that you have purchased in the past have been gathered in the Document Library for your convenience.

Visit the Document Library

Difficulty Finding Your Product Or Lot/Batch Number?

Product numbers are combined with Pack Sizes/Quantity when displayed on the website (example: T1503-25G). Please make sure you enter ONLY the product number in the Product Number field (example: T1503).

Example:

T1503
Product Number
-
25G
Pack Size/Quantity

Additional examples:

705578-5MG-PW

PL860-CGA/SHF-1EA

MMYOMAG-74K-13

1000309185

enter as 1.000309185)

Having trouble? Feel free to contact Technical Service for assistance.

Lot and Batch Numbers can be found on a product's label following the words 'Lot' or 'Batch'.

Aldrich Products

  • For a lot number such as TO09019TO, enter it as 09019TO (without the first two letters 'TO').

  • For a lot number with a filling-code such as 05427ES-021, enter it as 05427ES (without the filling-code '-021').

  • For a lot number with a filling-code such as STBB0728K9, enter it as STBB0728 without the filling-code 'K9'.

Not Finding What You Are Looking For?

In some cases, a COA may not be available online. If your search was unable to find the COA you can request one.

Request COA

Customers Also Viewed

Slide 1 of 5

1 of 5

Copper oxide wire about 0.65 x 6 mm for elementary analysis (surface: CuO, core: Cu₂O) ACS

Supelco

1.02767

Copper oxide

Copper(I) oxide powder, ≤7 μm, 97%

Sigma-Aldrich

208825

Copper(I) oxide

Bismuth(III) oxide ReagentPlus®, powder, 10 μm, 99.9% trace metals basis

Sigma-Aldrich

223891

Bismuth(III) oxide

Barium carbonate ACS reagent, ≥99%

Sigma-Aldrich

237108

Barium carbonate

DSC kinetics of the thermal decomposition of copper (II) oxalate by isoconversional and maximum rate (peak) methods.
Muraleedharan K and Kripa S.
Journal of Thermal Analysis and Calorimetry, 115(2), 1969-1978 (2014)
A refinement of the crystal structure of copper (II) oxide with a discussion of some exceptional esd's.
?sbrink S and Norrby LJ.
Acta Crystallographica Section B, Structural Science, 26(1), 8-15 (1970)
Eagleson M.
Concise Encyclopedia Chemistry, 523-523 (1994)
Copper (II) oxide nanowires for p-type conductometric NH3 sensing.
Shao F, et al.
Applied Surface Science, 311, 177-181 (2014)
Sumanta Kumar Meher et al.
Nanoscale, 5(5), 2089-2099 (2013-02-06)
In the quest to enhance the selectivity and sensitivity of novel structured metal oxides for electrochemical non-enzymatic sensing of glucose, we report here a green synthesis of unique sandwich-structured CuO on a large scale under microwave mediated homogeneous precipitation conditions.

Our team of scientists has experience in all areas of research including Life Science, Material Science, Chemical Synthesis, Chromatography, Analytical and many others.

Contact Technical Service