Chromium(III) bromide

Chromium(III) bromide
Names
	IUPAC name Chromium(III) bromide
	Other names Chromic bromide; Chromium bromide; Chromium tribromide;
Identifiers
CAS Number	10031-25-1 ; 13478-06-3 (hexahydrate);
3D model (JSmol)	Interactive image;
ChemSpider	74280;
ECHA InfoCard	100.030.068
EC Number	233-088-6;
PubChem CID	5155129;
UNII	WZB719DDER ;
CompTox Dashboard (EPA)	DTXSID40905343 ;
	InChI InChI=1S/3BrH.Cr/h3*1H;/q;;;+3/p-3 Key: UZDWIWGMKWZEPE-UHFFFAOYSA-K;
	SMILES [Cr+3].[Br-].[Br-].[Br-];
Properties
Chemical formula	CrBr3
Molar mass	291.708 g·mol−1
Appearance	black lustrous crystals; green in transmitted light; reddish in reflected light;
Density	4.25 g/cm3
Melting point	1,130 °C (2,070 °F; 1,400 K) (anhydrous) ; 79 °C (hexahydrate)
Solubility in water	anhydrous; insoluble in cold water soluble with addition of chromium(II) saltssoluble in hot waterhexahydrate; highly soluble
Structure
Crystal structure	trigonal
Hazards
	GHS labelling:
Pictograms
Signal word	Danger
Hazard statements	H302+H312, H314, H317, H330, H361
Precautionary statements	P203, P260, P264, P264+P265, P270, P271, P272, P280, P284, P301+P317, P301+P330+P331, P302+P352, P302+P361+P354, P304+P340, P305+P354+P338, P316, P317, P318, P320, P321, P330, P333+P317, P362+P364, P363, P403+P233, P405, P501
	NIOSH (US health exposure limits):
PEL (Permissible)	TWA 1 mg/m3
REL (Recommended)	TWA 0.5 mg/m3
IDLH (Immediate danger)	250 mg/m3
	Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa). Infobox references

Chromium(III) bromide is an inorganic compound with the chemical formula Cr Br₃. It is a dark colored solid that appears green in transmitted light but red with reflected light. It is used as a precursor to catalysts for the oligomerization of ethylene.