ChemicalBook CAS DataBase List 7787-70-4

7787-70-4

Name	Cuprous bromide
CAS	7787-70-4
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.)
Boiling point	1345 °C
density	4.71 g/mL at 25 °C(lit.)
Fp	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
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
Exposure limits	ACGIH: TWA 1 mg/m3 NIOSH: IDLH 100 mg/m3; TWA 1 mg/m3
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. less more
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 . less more
Safety Statements	S22:Do not breathe dust . S24/25:Avoid contact with skin and eyes . less more
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)

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)

Spectrum Detail

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