Cuprous bromide Chemical Properties

Melting point:

504 °C(lit.)

Boiling point:

1345 °C

Density 

4.71 g/mL at 25 °C(lit.)

Flash point:

1345°C

storage temp. 

Keep in dark place,Inert atmosphere,Room temperature

solubility 

insoluble in acetone

form 

Powder

color 

Pale green to green

Specific Gravity

4.98

Water Solubility 

Soluble in hydrogen bromide, hydrochloric acid, and ammonium hydroxide. Slightly soluble in water. Insoluble in acetone.

Sensitive 

Air Sensitive

Crystal Structure

Hexagonal, Wurtzite (Zincite) Structure - Space Group P 63mc

Merck 

14,2659

Solubility Product Constant (Ksp)

pKsp: 8.2

Exposure limits

ACGIH: TWA 1 mg/m3
NIOSH: IDLH 100 mg/m3; TWA 1 mg/m3

Stability:

Stable, but may be air or light sensitive. Incompatible with alkali metals, strong oxidizing agents.

InChIKey

NKNDPYCGAZPOFS-UHFFFAOYSA-M

CAS DataBase Reference

7787-70-4(CAS DataBase Reference)

NIST Chemistry Reference

Copper(I) bromide(7787-70-4)

EPA Substance Registry System

Copper bromide (CuBr) (7787-70-4)

Safety Information

Hazard Codes 

Xi

Risk Statements 

36/37/38-22

Safety Statements 

22-24/25-26-37/39

RIDADR 

3260

WGK Germany 

3

F 

8-10-23

TSCA 

Yes

HazardClass 

8

PackingGroup 

III

HS Code 

28275900

Hazardous Substances Data

7787-70-4(Hazardous Substances Data)

MSDS

• Language:English Provider:Copper(I) bromide
• Language:English Provider:ACROS
• Language:English Provider:SigmaAldrich
• Language:English Provider:ALFA

Cuprous bromide Usage And Synthesis

Chemical Properties

Copper(I) bromide is a white, cubic, crystalline material that decomposes on exposure to light or moisture in air. It forms complexes with hydrochloric and hydrobromic acids and aqueous ammonia.

Uses

As catalyst for organic reactions.

Uses

Copper bromide is also known as cupric bromide, this substance was made by double decomposition when mixing aqueous solutions of copper sulfate and potassium bromide. This greenish blue solution was used as the bleaching step for intensifying collodion and gelatin negatives.

Uses

It is used as effective catalyst for tetrahydropyranylation of alcohols. It can also be used in combination with palladium in catalytic synthesis of 3-haloindoles through annulation process. It is widely used in the synthesis of organic fine chemicals. The compound is widely used in the synthesis of organic compounds. It is also useful for copper-mediated coupling reactions. A silica gel support copper bromide hexa methyltriethylenetetramine complex has shown useful application for the atom transfer radical polymerization of methyl methacrylate in toluene.

Preparation

It is prepared pyrometallurgically with copper metal and elemental bromine in a process similar to that for copper(I) chloride. It can also be produced by the reduction of copper(II) sulfate solutions in the presence of sodium bromide using metallic copper or sulfite as the reducing agent. Copper(I) bromide is used as a polymerization catalyst in organic reactions.

General Description

White powder or crystal. Turns green to dark blue on exposure to sunlight. Sinks and mixes slowly with water.

Air & Water Reactions

Mixes slowly with water.

Reactivity Profile

Cuprous bromide has weak oxidizing or reducing powers. Redox reactions can however still occur. The majority of compounds in this class are slightly soluble or insoluble in water. If soluble in water, then the solutions are usually neither strongly acidic nor strongly basic. These compounds are not water-reactive.

Health Hazard

INHALATION: Irritation of upper respiratory tract. EYES: Irritation of conjunctivae. SKIN: Irritation, acne-like rash (usually from prolonged exposure). INGESTION: Vomiting caused by local irritant and astringent action of ionic Cu on stomach and intestines. Pain in mouth, esophagus, and stomach. Inorganic bromides produce depression, psychoses, and mental deterioration.

Purification Methods

Purify it as for cuprous iodide but using aqueous NaBr. [Keller & Wycoff Inorg Synth II 3 1946, Glemser & Sauer in Handbook of Preparative Inorganic Chemistry (Ed. Brauer) Academic Press Vol II p 1006 1965.]

Cuprous bromide(7787-70-4)Related Product Information

• Copper
• Cupric bromide
• Copper(I) bromide-dimethyl sulfide
• Tetrabutylammonium bromide
• Calcium bromide
• Ammonium bromide
• Sodium bromate
• Copper(II) sulfate
• Hydrogen bromide
• Copper(I) chloride
• Sodium bromide
• Benzyl bromide
• Potassium bromide
• Ethidium bromide
• Phosphorus tribromide
• IRON (II) BROMIDE
• Clidinium bromide
• Boron tribromide