Copper(II) bromide

Copper (II) bromide
	; Anhydrous
	; Tetrahydrate
Names
	Other names Cupric bromide; Copper dibromide
Identifiers
CAS Number	7789-45-9 ;
3D model (JSmol)	Interactive image;
ChemSpider	8395631 ;
ECHA InfoCard	100.029.243
EC Number	232-167-2;
PubChem CID	24611;
UNII	1KC430K0ZN ;
CompTox Dashboard (EPA)	DTXSID7064863 ;
	InChI InChI=1S/2BrH.Cu/h21H;/q;;+2/p-2 Key: QTMDXZNDVAMKGV-UHFFFAOYSA-L ; InChI=1/2BrH.Cu/h21H;/q;;+2/p-2 Key: QTMDXZNDVAMKGV-NUQVWONBAD;
	SMILES [Cu+2].[Br-].[Br-];
Properties
Chemical formula	CuBr2
Molar mass	223.37 g/mol
Appearance	grayish black crystals ; deliquescent
Density	4.710 g/cm3, solid
Melting point	498 °C (928 °F; 771 K)
Boiling point	900 °C (1,650 °F; 1,170 K)
Solubility in water	55.7 g/100 mL (20 °C)
Solubility	Soluble in alcohol, acetone, ammonia, insoluble in benzene, ether, ethyl ether, sulfuric acid
Magnetic susceptibility (χ)	+685.5·10−6 cm3/mol
Structure
Crystal structure	monoclinic
Hazards
NFPA 704 (fire diamond)	2 0 0
	NIOSH (US health exposure limits):
PEL (Permissible)	TWA 1 mg/m3 (as Cu)
REL (Recommended)	TWA 1 mg/m3 (as Cu)
IDLH (Immediate danger)	TWA 100 mg/m3 (as Cu)
Related compounds
Other anions	Copper(II) fluoride; Copper(II) chloride
Other cations	Copper(I) bromide; Nickel(II) bromide; Zinc bromide; Cadmium bromide; Mercury(II) bromide
	Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa). verify (what is ?) Infobox references

Copper(II) bromide (Cu Br₂) is a chemical compound that forms an unstable tetrahydrate CuBr₂·4H₂O. It is used in photographic processing as an intensifier and as a brominating agent in organic synthesis.

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 reacting with the copper discharge tube. Producing yellow or green light, it is used in dermatological applications.

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