Molekula
Copper (I) oxide, 99.9%Cu
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 (Cu₂O) is a bright red inorganic compound primarily used in electronics, pigments, and as a catalyst in chemical synthesis. It is also employed in gas sensing and as a semiconductor material. Further applications include agricultural fungicides, marine antifouling paints, and red colorants for glass and ceramic glazes. This high-purity 99.9% copper oxide has a CAS number of 1317-39-1, a molecular weight of 143.09 g/mol, and requires ambient storage. It carries a signal word of *Danger* due to its potential 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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5 g — £76.30 per pack ex VAT · £91.56 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
Specifications available on request — see Documents below or contact our sales team.
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 | 90028781 |
| 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
-
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 (Cu₂O) commonly used for?
Copper(I) oxide is primarily used in electronics (semiconductors, superconductors), as a pigment in ceramics and glass, and in chemical synthesis, including organic reactions as a mild oxidizing agent.
What is the chemical formula and molecular weight of copper(I) oxide?
The chemical formula is **Cu₂O**, and the molecular weight is **143.09 g/mol**.
How should copper(I) oxide be stored?
Store in a cool, dry, well-ventilated area at ambient temperature, away from moisture and incompatible substances. Use airtight containers.
What purity grades of copper(I) oxide does Molekula supply?
Molekula supplies copper(I) oxide at **99.9% Cu** purity as standard.
Can Molekula supply copper(I) oxide in bulk quantities?
Yes, Molekula can supply copper(I) oxide in bulk, with quantities tailored to customer requirements—please contact us for specific inquiries.
What documentation is provided with an order of copper(I) oxide?
Each order includes a **Certificate of Analysis (CoA)**, **Material Safety Data Sheet (MSDS)**, and **batch-specific documentation** for traceability.
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.