Copper(I) oxide
Copper(I) oxide (CAS: 1317-39-1), with the chemical formula Cu2O, is a reddish solid known for its semiconducting properties. It is primarily utilised as a catalyst in various chemical syntheses and reactions. This inorganic compound also finds application in antifouling paints and as a pigment. Tech Serve Solutions supplies this essential chemical with a minimum assay of 86% Cu.
- IUPAC
- Cuprous oxide

Catalysis
Copper(I) oxide serves as a crucial catalyst in numerous organic reactions, including cross-coupling reactions and cycloadditions. Its catalytic activity is vital for efficient chemical synthesis pathways.
Pigments
The distinct reddish colour of Cu2O makes it a valuable pigment in various formulations, including ceramics and glass. It imparts a stable and vibrant hue.
Antifouling Coatings
Due to its biocidal properties, copper(I) oxide is incorporated into antifouling paints for marine applications. It effectively prevents the growth of marine organisms on submerged surfaces.
Semiconductor Applications
As a p-type semiconductor, Cu2O has applications in the development of solar cells and photodetectors. Its unique electronic properties are of interest in materials science.
| Molecular weight | 143.09 |
|---|---|
| Empirical formula | Cu2O |
| Assay | ≥86% Cu basis |
| Density | 6 g/mL at 25 °C(lit.) |


Hazard statements
- H302Harmful if swallowed
- H410Very toxic to aquatic life with long-lasting effects
Precautionary statements
- P273Avoid release to the environment
- P501Dispose of contents and container per local regulations
| Protective equipment | dust mask type N95 (US), Eyeshields, Faceshields, Gloves |
|---|---|
| Transport (UN / ADR) | UN 3077 9 / PGIII |
| Water hazard class (WGK, DE) | 3 |
| Hazard codes (EU) | Xn,N |
| Risk statements (R) | 22-50/53 |
| Safety statements (S) | 22-60-61 |
| Cation traces | Ag: ≤50 mg/kgFe: ≤500 mg/kgNi: ≤100 mg/kg |
Hazard information is provided for guidance. Always consult the product Safety Data Sheet (SDS), available on request, before handling.
Documentation
Every batch ships with a Certificate of Analysis covering assay, identity and purity; the grade is confirmed against your enquiry. Safety Data Sheets and technical data sheets are available on request.
Supply & logistics
Samples for technical evaluation; bulk MOQ by grade and packaging. In-stock material ships in 7–10 working days, worldwide, with full export documentation.
What is Copper(I) oxide used for?
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Copper(I) oxide is primarily used as a catalyst in chemical synthesis, as a pigment in paints and ceramics, in antifouling coatings, and in semiconductor applications.
What is the CAS number and chemical formula for Copper(I) oxide?
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The CAS number for Copper(I) oxide is 1317-39-1, and its chemical formula is Cu2O.
What grade and purity does Tech Serve Solutions supply?
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Tech Serve Solutions supplies Copper(I) oxide with a minimum assay of 86% Cu. We do not represent this product as USP, BP, EP, or pharmacopoeia grade.
How should Copper(I) oxide be handled safely?
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Copper(I) oxide (CAS: 1317-39-1) is harmful if swallowed and very toxic to aquatic life with long-lasting effects (H302-H410). Handle with appropriate personal protective equipment, including a dust mask (type N95 US), eyeshields, face shields, and gloves. Ensure good ventilation and avoid release to the environment.
Is Copper(I) oxide a controlled substance?
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The provided data does not indicate that Copper(I) oxide (CAS: 1317-39-1) is a controlled substance.
How is Copper(I) oxide packed and shipped?
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Copper(I) oxide is shipped as UN 3077, Environmentally Hazardous Substance, Solid, N.O.S. (Copper(I) oxide), 9, III. Please contact TSS for specific packing details for export.
How can I request a sample or quote for Copper(I) oxide?
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To request a sample or a quote for Copper(I) oxide, please contact the Tech Serve Solutions sales team through our website or by phone.
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