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|Copper (II) bromide|
|Jmol-3D images||Image 1|
|Molar mass||223.37 g/mol|
|Appearance||grayish black crystals
|Density||4.710 g/cm3, solid|
498 °C, 771 K, 928 °F
900 °C, 1173 K, 1652 °F
|Solubility in water||55.7 g/100 mL (20 °C)|
|EU Index||Not listed|
|Other anions||copper(II) fluoride
|Other cations||nickel(II) bromide
| (what is: / ?)
Except where noted otherwise, data are given for materials in their standard state (at 25 °C, 100 kPa)
It is also used in the Copper vapor laser, a class of laser where the medium is copper bromide vapour formed in situ from hydrogen bromide in reaction with the enclosing copper discharge tube. Producing yellow or green light, it is used in dermatological applications.
Copper(II) bromide can be obtained by combining copper oxide and hydrobromic acid: CuO + 2HBr -> CuBr2 + H2O.
Copper(II) bromide is purified by crystallisation twice from water, filtration to remove any CuBr and concentration under vacuum. This product is dehydrated using phosphorus pentoxide. 
The crystal structures of Cu2Br6 dimers were obtained. Copper (II) centers each perform D2d geometry with a geometry intermediate between tetrahedral and square planar. The crystal structures exhibit two phases: the orange and the green. Under the application of a small force such as pressure the orange phase can transform to the green phase. Upon heating to 90ْC the green phase can change into the orange. With the correlation of polarized absorption spectral data and X-ray crystallography it was determined that the color variance is due to the different orientation of the dimer phases.
Copper (II) bromide in chloroform-ethyl acetate reacts with ketones resulting in alpha-bromo ketones. The resulting product can be directly used for the preparation of derivatives. This heterogeneous method is reported to be the most selective and direct method of α-bromo ketones formation.
Dibromination of NPGs, n-pentenyl glycosides, using CuBr2/LiBr reagent combination was performed in order for an NPG to serve as a glycosyl acceptor during halonium-promoted couplings. Such reaction gives high yield of the dibromides from alkenyl sugars that are resistant to a direct reaction with molecular bromine.
Lasers with Copper (II) bromide stream produce pulsed yellow and green light and are studied as a possible way of treatment of cutaneous lesions. Experiments have also shown a great effect of Copper Bromide treatment on skin rejuvenation. It has been widely used in photography as its solution was used as the bleaching step for intensifying collodion and gelatin negatives. There are also proposals of using Copper (II) bromide in humidity indicating cards 
Copper(II) bromide is harmful if swallowed. It affects the central nervous system, brain, eyes, liver, and kidneys. It causes irritation to skin, eyes, and respiratory tract.
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