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Chromium(III) bromide
Chemical compound / From Wikipedia, the free encyclopedia
Chromium(III) bromide is an inorganic compound with the chemical formula CrBr3. 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.
Quick Facts Names, Identifiers ...
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Names | |
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IUPAC name
Chromium(III) bromide | |
Other names
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Identifiers | |
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3D model (JSmol) |
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ChemSpider | |
ECHA InfoCard | 100.030.068 ![]() |
EC Number |
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PubChem CID |
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UNII | |
CompTox Dashboard (EPA) |
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Properties | |
CrBr3 | |
Molar mass | 291.708 g·mol−1 |
Appearance | Black lustrous crystals; green in transmitted light, reddish in reflected light[1] |
Density | 4.25 g/cm3[2] |
Melting point | 1,130 °C (2,070 °F; 1,400 K) (anhydrous)[2] 79 °C (hexahydrate) |
anhydrous: insoluble in cold water, soluble with addition of Chromium(II) ion salts,[1] soluble in hot water;[2] hexahydrate: highly soluble[2] | |
Structure | |
trigonal | |
Hazards | |
NIOSH (US health exposure limits): | |
PEL (Permissible) |
TWA 1 mg/m3[3] |
REL (Recommended) |
TWA 0.5 mg/m3[3] |
IDLH (Immediate danger) |
250 mg/m3[3] |
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
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