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7787-70-4

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Identification

Name
Cuprous bromide
CAS
7787-70-4
Synonyms
COPPER(+1)BROMIDE
COPPER BROMIDE
COPPER(I) BROMIDE
CUPROUS BROMIDE
copperbromide(cubr)
coppermonobromide
Copperbromideoffwhitepowder
Cupper(Ⅰ) bromide
Copper(I) bromide, 99.999% metals basis
Copper(I)Bromide,>98%
CuprousBromide(Anhydrous)
Copper(I)bromide,95%min.
Copper(I)bromide,97%
Copper(I) bromide, extra pure, 98%
CUPROUS BROMIDE 99.999%
Copper(Ⅰ) bromide
Copper(I)bromide,min.98%
copper(i) bromide, puratronic
CuBr Copper(I)bromide
COPPER(I) BROMIDE, 99.999%
EINECS(EC#)
232-131-6
Molecular Formula
BrCu
MDL Number
MFCD00010969
Molecular Weight
143.45
MOL File
7787-70-4.mol

Chemical Properties

Appearance
powder
Melting point 
504 °C(lit.)

mp 
504 °C(lit.)

Boiling point 
1345 °C
bp 
1345 °C
density 
4.71 g/mL at 25 °C(lit.)

Fp 
1345°C
storage temp. 
Keep in dark place,Inert atmosphere,Room temperature
form 
Powder
color 
Pale green to green
Specific Gravity
4.98
Stability:
Stable, but may be air or light sensitive. Incompatible with alkali metals, strong oxidizing agents.
Water Solubility 
Soluble in hydrogen bromide, hydrochloric acid, and ammonium hydroxide. Slightly soluble in water. Insoluble in acetone.
Crystal Structure
Hexagonal, Wurtzite (Zincite) Structure - Space Group P 63mc
Sensitive 
Air Sensitive
Merck 
14,2659
Solubility Product Constant (Ksp)
pKsp: 8.2
InChIKey
NKNDPYCGAZPOFS-UHFFFAOYSA-M
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.
CAS DataBase Reference
7787-70-4(CAS DataBase Reference)
NIST Chemistry Reference
Copper(I) bromide(7787-70-4)
EPA Substance Registry System
7787-70-4(EPA Substance)

Safety Data

Hazard Codes 
Xi
Risk Statements 
R36/37/38:Irritating to eyes, respiratory system and skin .
Safety Statements 
S22:Do not breathe dust .
S24/25:Avoid contact with skin and eyes .
RIDADR 
3260
WGK Germany 
3


8-10-23
TSCA 
Yes
HazardClass 
8
PackingGroup 
III
HS Code 
28275900
Hazardous Substances Data
7787-70-4(Hazardous Substances Data)

Raw materials And Preparation Products

Hazard Information

General Description
White powder or crystal. Turns green to dark blue on exposure to sunlight. Sinks and mixes slowly with water.
Reactivity Profile
COPPER BROMIDE (OUS)(7787-70-4) 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.
Air & Water Reactions
Mixes slowly with water.
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.
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.
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.
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.]

Material Safety Data Sheet(MSDS)

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