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208825

Sigma-Aldrich

Copper(I) oxide

powder, ≤7 μm, 97%

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Synonym(s):
Cuprous oxide
Linear Formula:
Cu2O
CAS Number:
Molecular Weight:
143.09
EC Number:
MDL number:
PubChem Substance ID:
NACRES:
NA.55

Assay

97%

form

powder

contains

stabilizer

particle size

≤7 μm

density

6 g/mL at 25 °C (lit.)

SMILES string

[Cu]O[Cu]

InChI

1S/2Cu.O

InChI key

BERDEBHAJNAUOM-UHFFFAOYSA-N

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1 of 4

This Item
5662844508121.02766
Copper(I) oxide powder, ≤7 μm, 97%

Sigma-Aldrich

208825

Copper(I) oxide

Copper(I) oxide ≥99.99% trace metals basis, anhydrous

Sigma-Aldrich

566284

Copper(I) oxide

Copper(II) oxide powder, 99.99% trace metals basis

Sigma-Aldrich

450812

Copper(II) oxide

Copper(II) oxide powder for analysis EMSURE® ACS

Supelco

1.02766

Copper(II) oxide

form

powder

form

powder

form

powder

form

solid

density

6 g/mL at 25 °C (lit.)

density

6 g/mL at 25 °C (lit.)

density

-

density

6.48 g/cm3 at 25 °C

Quality Level

200

Quality Level

100

Quality Level

100

Quality Level

300

contains

stabilizer

contains

-

contains

-

contains

-

particle size

≤7 μm

particle size

-

particle size

-

particle size

≤160 μm (d95,laser diffraction)

General description

Copper(I)oxide is a weak base that can be used in nucleophilic substitution, decarboxylation, cyclocondensation, and 1,1-addition reactions. It can also be used to form carbenoid intermediates from diazo compounds and radicals from arenediazonium salts.

Application

Copper(I) oxide can be used as a catalyst to synthesize:
  • Ynones via solvent-free Sonogashira reaction.
  • N-Heteroaryl derivatives via cross-coupling of nitrogen heterocycles with halopyridines.

Signal Word

Danger

Hazard Statements

Hazard Classifications

Acute Tox. 4 Inhalation - Acute Tox. 4 Oral - Aquatic Acute 1 - Aquatic Chronic 1 - Eye Dam. 1

Storage Class Code

13 - Non Combustible Solids

WGK

WGK 3

Flash Point(F)

Not applicable

Flash Point(C)

Not applicable


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