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Oxides and peroxides

Cuprous oxide

Also known as Rose Copper, C.I. 77402, copper(1+), oxygen(2-)

CAS 1308-76-5Formula Cu2OMolar mass 143.09 g/molEC 215-270-7
24 suppliers listed Drug substance
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Cuprous oxide chemical structure, Cu2O, CAS 1308-76-5
2D chemical structure

Key facts

What buyers check first

All properties
CAS number
1308-76-5
Formula
Cu2O
Molar mass
143.09 g/mol
EC number
215-270-7
HS code
282550
Category
Oxides and peroxides

What is Cuprous oxide?

Plain description, key identifiers and synonyms

Cuprous oxide is any copper oxide in which the metal is in the +1 oxidation state. It contains a copper(1+).

Identifiers

Registry numbers, names and line notations, tap to copy

IUPAC name
bis(copper(1+)), oxygen(2-)
CAS number
1308-76-5Other or deprecated CAS: 1317-39-1
EC number
215-270-7
Molecular formula
Cu2O
InChIKey
KRFJLUBVMFXRPN-UHFFFAOYSA-N
InChI
InChI=1S/2Cu.O/q2*+1;-2
SMILES (canonical and isomeric)
[O-2].[Cu+].[Cu+]

Synonyms

  • Rose Copper
  • C.I. 77402
  • copper(1+), oxygen(2-)
  • Dicopper(1+) oxide
  • dicuprous, oxygen(2-)
  • copper(1+) oxidocopper
  • copper(I) oxide (cuprite)

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

No measured properties are recorded for this substance yet. Ask suppliers for a technical data sheet.

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
143.09 g/molcalc.
Exact mass
141.8541 Dacalc.
LogP (octanol/water)
-0.12calc.
Topological polar surface area
28.5 Ųcalc.
Hydrogen bond donors
0calc.
Hydrogen bond acceptors
0calc.
Rotatable bonds
0calc.
Heavy atoms
3calc.
Rings
0calc.
Aromatic rings
0calc.
Fraction sp3 carbons
0calc.
Formal charge
0calc.
Stereocentres
0calc.
Components
3calc.

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 oxide suppliers

Sponsored listings first, then the documented ranking: membership, verification, replies, completeness, freshness and ratings

All 24 suppliers
24 of 24 offers

Suppliers marked Unclaimed profile have not claimed their profile yet. They are not verified by CompoundList, their offers are price on request and details may have changed, so please confirm them with the supplier. Company representatives can claim a profile with a business email on the company's own website domain. Our team verifies each claim and sends the result by email.

Where suppliers are based

24 suppliers in 8 countries

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Cuprous oxide 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

Functional uses

  • Softener and conditioner

Regulatory status

Inventories, regulations and trade controls that list this substance

Health and food

  • Active ingredient in FDA approved drug labels

HS code and trade data

Customs classification and reported world trade statistics

Global trade

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

HS 2825.50Indicative HS code

Copper oxides and hydroxides

World exports in 2024
$547M
+23.8% vs 2023, imports $567M
2019 to 2024
Top exporters
  1. United States34.1%
  2. Norway * partner reported21.5%
  3. Australia9.7%
Top importers
  1. China16.0%
  2. South Korea9.4%
  3. United Kingdom6.4%

* Partner reported figures, a lower bound.

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

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

Frequently asked questions

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

What is Cuprous oxide?

Cuprous oxide is any copper oxide in which the metal is in the +1 oxidation state. It contains a copper(1+).

What is the CAS number of Cuprous oxide?

The CAS registry number of Cuprous oxide is 1308-76-5. Other or deprecated CAS numbers: 1317-39-1.

What is the molecular formula and weight of Cuprous oxide?

The molecular formula of Cuprous oxide is Cu2O and its molar mass is 143.09 g/mol.

What is Cuprous oxide used for?

Known uses and roles of Cuprous oxide include pigments in paints and coatings, trace minerals in animal feed and nutrition and softener and conditioner.

Is Cuprous oxide hazardous?

No GHS hazard classification for Cuprous oxide 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 oxide?

Cuprous oxide is usually classified under HS code 282550 (Copper oxides and hydroxides). This is indicative, confirm it with your customs broker before shipping.

Where can I buy Cuprous oxide?

CompoundList lists 24 suppliers of Cuprous oxide in China, India, United States, United Arab Emirates and 4 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 oxide in India?

7 suppliers in India list Cuprous oxide 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 oxide?

Suppliers quote Cuprous oxide 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 oxide

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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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