| Identification | Back Directory | [Name]
CHROMIUM BROMIDE | [CAS]
10031-25-1 | [Synonyms]
Einecs 233-088-6
Chromium(Ⅲ) bromide
Chromium(IV)bromide
chromiumbromide(crbr3)
chromium(3+),tribromide
Chromium(III) tribromide
Chromium(III) Bromide Powder
CHROMIUM BROMIDE ISO 9001：2015 REACH
CHROMIUM(III)BROMIDE,ANHYDROUSFLAKES,99%
Chromium(III) bromide, anhydrous flakes, 99% | [EINECS(EC#)]
233-088-6 | [Molecular Formula]
Br4Cr | [MDL Number]
MFCD00016036 | [MOL File]
10031-25-1.mol | [Molecular Weight]
371.612 |
| Chemical Properties | Back Directory | [Melting point ]
1130°C | [density ]
4.680 | [solubility ]
soluble in hot H2O, benzene | [form ]
dark green hexagonal crystals | [color ]
dark green hexagonal, hexane crystals, crystalline | [Water Solubility ]
insoluble cold H2O, soluble hot H2O [HAW93] | [Stability:]
hygroscopic | [EPA Substance Registry System]
Chromium bromide (CrBr3) (10031-25-1) |
| Hazard Information | Back Directory | [Chemical Properties]
black crystal(s); used as a catalyst for polymerization of olefins [HAW93] | [Preparation]
Electrolytic Cr powder is spread in a thin layer in a quartz reactor tube and bromine vapor, predried over PSO5, is passed over the Cr in a stream of O2-free, dry N2 or Ar. The quartz tube is heated to about 1000°C, after that the two elements combine with incandescence at the beginning of the reaction. The unconverted Br2 is condensed in a receiver cooled in an ice-salt mixture. After 45-60 minutes, the material can cool while maintaining the gas stream. The lustrous black, leafy crystals of CrBr3 are purified by several extractions with absolute ether and decantations with ice water (to remove traces of adhering CrBr2).
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