Copper(I) bromide
Copper(I) bromide (CAS 7787-70-4), also known as cuprous bromide, is a white to grey powder with the molecular formula CuBr and a molecular weight of 143.45 g/mol. This inorganic salt is a crucial reagent in organic synthesis, particularly in atom transfer radical polymerization (ATRP) as a catalyst component. It finds utility across various chemical research and industrial applications requiring a source of copper(I) ions.
- IUPAC
- Cuprous bromide
- Synonyms
- Cuprous bromide

Atom Transfer Radical Polymerization (ATRP)
Copper(I) bromide serves as a key metal catalyst component in ATRP, a controlled polymerization technique. It facilitates precise control over polymer chain growth, enabling the synthesis of polymers with tailored architectures and molecular weights.
Organic Synthesis
CuBr is employed as a reagent in various organic transformations, including Sandmeyer-type reactions and as a catalyst in coupling reactions. Its ability to participate in redox cycles makes it valuable for facilitating specific bond formations.
Catalysis
As a copper(I) salt, it acts as a catalyst or co-catalyst in a range of chemical reactions, influencing reaction rates and selectivity in inorganic and organometallic chemistry.
Materials Science
Copper(I) bromide can be utilized in the development and synthesis of novel materials, leveraging its unique chemical properties for applications in areas such as inorganic crystal growth and precursor synthesis.
| Molecular weight | 143.45 |
|---|---|
| Linear formula | CuBr |
| Assay | 99.999% trace metals basis |
| Form | powder |
| Density | 4.71 g/mL at 25 °C(lit.) |
| Melting point | 504 °C(lit.) |

Hazard statements
- H315Causes skin irritation
- H319Causes serious eye irritation
- H335May cause respiratory irritation
Precautionary statements
- P261Avoid breathing dust, fume, gas or vapours
- P305IF IN EYES
| Protective equipment | Eyeshields, Gloves, type N95 (US), type P1 (EN143) respirator filter |
|---|---|
| Water hazard class (WGK, DE) | 3 |
| Hazard codes (EU) | Xi |
| Risk statements (R) | 36/37/38 |
| Safety statements (S) | 26 |
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) bromide used for?
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Copper(I) bromide is primarily used as a catalyst component in Atom Transfer Radical Polymerization (ATRP) and in various organic synthesis reactions, including Sandmeyer-type transformations and coupling reactions. It also finds applications in catalysis and materials science.
What is the CAS number and formula for Copper(I) bromide?
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The CAS number for Copper(I) bromide is 7787-70-4, and its linear formula is CuBr.
What grade and purity does Tech Serve Solutions supply for Copper(I) bromide?
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Tech Serve Solutions supplies Copper(I) bromide with an assay of 99.999% trace metals basis. This product is supplied for research and laboratory use and is not represented as USP, BP, or EP grade.
How should Copper(I) bromide be handled safely?
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Copper(I) bromide is a Warning substance that causes skin irritation (H315), serious eye irritation (H319), and may cause respiratory irritation (H335). When handling, use eyeshields, gloves, and a type N95 (US) or type P1 (EN143) respirator filter. Ensure good ventilation and avoid breathing dust.
How is Copper(I) bromide packed and shipped by TSS?
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As a global supplier and exporter, Tech Serve Solutions adheres to all regulations for packing and shipping chemicals like Copper(I) bromide, ensuring safe transit to domestic and international destinations.
How can I request a quote or sample of Copper(I) bromide?
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To request a quote or sample of Copper(I) bromide, please contact our sales team via the website or call us directly. Our team will be pleased to assist with your inquiry.
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