Molekula
Copper (I) oxide
Supplying 4,500+ customers in over 80 countries
ISO 9001:2015 & ISO 14001:2015 certified · Supplying laboratories and industry since 2000 · Listed pack sizes are a starting point — we manufacture, source and repack to the quantity you need
Copper (I) oxide is a red crystalline solid used in ceramics, glass manufacturing, and as a catalyst in chemical reactions. It is also employed in semiconductor applications and as a pigment. Further applications include marine antifouling paints, agricultural copper fungicides, brazing pastes and electroplating. Available in powder form, it has a molecular formula of Cu₂O, a molecular weight of 143.09 g/mol, and is stable at ambient storage conditions. It is classified as dangerous due to its potential health and environmental hazards. Molekula supplies Copper (I) oxide from research to bulk quantities with full documentation and ISO 9001:2015 traceability.
Example image for illustration only. Other packaging and pack sizes are available.
Pricing & pack sizes
These pack sizes aren't a limit. Molekula manufactures, sources and repacks to order — if you need 500 kg and only see 1 kg listed, . We quote from grams to multi-tonne.
Need a different size? Add the nearest pack and change the size in your basket — we price it at the same rate per unit.
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100 g — £26.40 per pack ex VAT · £31.68 inc. VAT
Need a different quantity or pack?
Tell us how much you need and when — drums, IBCs, sacks or a one-off bulk lot. We'll manufacture or source it and come back with a price.
Prices exclude VAT/sales tax and shipping.
Specifications
| Property | Value |
|---|---|
| Appearance | Red to brown powder |
| Colour | Dark red brown |
| Chloride (Cl-) | ≤0.5% |
| Assay | ≥97.0% Cu2O |
| Particle Size | 3-4µm average |
| Bulk density | 1.3-1.4g/ml |
| CuO | ≤0.5% |
| Copper (Cu) | ≥86% |
| Sulphates (SO4)(2-) | ≤0.1% |
| Reducing power | ≥97% |
| Insoluble: in Nitric Acid | ≤0.5% |
| Acetone Soluble | ≤0.5% |
| Other Metals | ≤0.5% |
Storage & handling
| Property | Value |
|---|---|
| Storage Temperature | Ambient |
| Transport Class | 9 |
| Packing Group | III |
| Acidity | Neutral |
Literature values
Published physical properties of the substance, not batch specifications.
| Property | Value |
|---|---|
| Appearance | Red-brown cubic crystals |
| Melting Point | 1235 °C |
| Density | 6 (relative, water = 1) |
| Water Solubility | Insoluble in water |
| Solubility (other solvents) | Soluble in acids and ammonium hydroxide; insoluble in water |
Source: PubChem CID 18346908 (HSDB, ICSC)
Identification
| Property | Value |
|---|---|
| SKU | 38795886 |
| CAS Number | 1317-39-1 |
| IUPAC Name | copper;oxocopper |
| Molecular Formula | Cu2O |
| Molecular Weight | 143.09 |
| Exact Mass | 141.8541 |
| SMILES | O=[Cu].[Cu] |
| InChIKey | BERDEBHAJNAUOM-UHFFFAOYSA-N |
| InChI | InChI=1S/2Cu.O |
| PubChem CID | 18346908 |
| UN Number | UN3077 |
| REACH Code | Y110 |
| TSCA Listed | Yes |
| HTS Code | 28255020 |
| Tariff Code | 2825500020 |
Safety & GHS
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Corrosive
GHS05
-
Health Hazard
GHS07
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Hazardous to the Environment
GHS09
Hazard statements
- H302+332 Harmful if swallowed or inhaled
- H318 Causes serious eye damage
- H400 Very toxic to aquatic life
- H410 Very toxic to aquatic life with long lasting effects
Precautionary statements
- P261 Avoid breathing dust/fume/gas/mist/vapours/spray
- P273 Avoid release to the environment
- P280 Wear protective gloves/protective clothing/eye protection/face protection
- P301+312 IF SWALLOWED: Call a POISON CENTER or doctor/physician if you feel unwell
- P305+351+338 IF IN EYES: Rinse with water for several minutes. Remove contact lenses if present and easy to do. Continue rinsing
- P337+313 If eye irritation persists get medical advice/attention
Documents
Safety Data Sheets (SDS)
Available in English, French, German, Italian, Spanish.
Certificate of Analysis (CoA) by batch
Enter a lot or batch number to retrieve the CoA for that specific batch. We can generate one from spec data if no PDF is on file.
Synonyms
- (cupriooxy)copper
- Brown copper oxide
- Caocobre
- Caswell No. 266
- CI 77402
- Copox
- Copper hemioxide
- Copper Nordox
- Copper oxide (Cu2O)
- Copper oxide, red
Frequently asked questions
What is Copper (I) oxide used for?
Copper (I) oxide is used in the production of ceramics, glass, and as a catalyst in chemical reactions.
What is the chemical formula and molecular weight of Copper (I) oxide?
The formula is Cu2O and the molecular weight is 143.09 g/mol.
How should Copper (I) oxide be stored?
It should be stored at ambient temperature, away from moisture and incompatible materials.
What grade of Copper (I) oxide does Molekula supply?
Molekula supplies Copper (I) oxide in technical grade; custom grades available upon request.
Can Molekula supply Copper (I) oxide in bulk?
Yes, Molekula can supply Copper (I) oxide in bulk quantities; please contact sales for details.
What documentation comes with a Copper (I) oxide order?
Each order includes a Certificate of Analysis and Safety Data Sheet (SDS) with the shipment.
Ready to order or need a custom pack?
Tell us the product, grade, and quantity — Molekula usually responds within one working day with pricing and lead time.