| Identification | More | [Name]
TELLURIUM TETRABROMIDE | [CAS]
10031-27-3 | [Synonyms]
TELLURIUM BROMIDE
TELLURIUM (IV) BROMIDE
TELLURIUM TETRABROMIDE
(beta-4)-telluriumbromide(tebr4
Tellurium(IV) bromide (99.9%-Te)
TelluriumIVbromidemeshpowder
TELLURIUM TETRABROMIDE ANHYDROUS BEAD&
TELLURIUM TETRABROMIDE 99%
TELLURIUM TETRABROMIDE, ANHYDROUS, POWDE R, 99.999%
Tellurium(Ⅳ) bromide
tellurium(iv) bromide, ultra dry
Tellurium(IV) bromide, ultra dry, 99.999% (metals basis)
Tellurium(IV) bromide, 99.9% (metals basis)
Tellurium bromide(TeBr4)
Tellurium(IV) tetrabromide | [EINECS(EC#)]
233-090-7 | [Molecular Formula]
Br4Te | [MDL Number]
MFCD00049575 | [Molecular Weight]
447.22 | [MOL File]
10031-27-3.mol |
| Chemical Properties | Back Directory | [Appearance]
Yellow crystals. Soluble in a little water (decomposes in excess
water). | [Melting point ]
~380 °C(lit.) | [Boiling point ]
420 °C(lit.) | [density ]
4.3 g/mL at 25 °C(lit.)
| [Fp ]
420°C | [solubility ]
reacts with H2O; soluble in ethyl ether | [form ]
beads
| [color ]
yellow-orange monoclinic
crystals, crystalline | [Water Solubility ]
It reacts with water and ethanol. | [Sensitive ]
Moisture Sensitive | [Merck ]
14,9125 | [Exposure limits]
ACGIH: TWA 0.1 mg/m3
NIOSH: IDLH 25 mg/m3; TWA 0.1 mg/m3 | [CAS DataBase Reference]
10031-27-3(CAS DataBase Reference) | [EPA Substance Registry System]
Tellurium bromide (TeBr4), (T-4)- (10031-27-3) |
| Safety Data | Back Directory | [Hazard Codes ]
C | [Risk Statements ]
R34:Causes burns. | [Safety Statements ]
S22:Do not breathe dust .
S26:In case of contact with eyes, rinse immediately with plenty of water and seek medical advice .
S27:Take off immediately all contaminated clothing .
S36/37/39:Wear suitable protective clothing, gloves and eye/face protection .
S45:In case of accident or if you feel unwell, seek medical advice immediately (show label where possible) . | [RIDADR ]
UN 3260 8/PG 2
| [WGK Germany ]
3
| [TSCA ]
Yes | [HazardClass ]
8 | [PackingGroup ]
II |
| Hazard Information | Back Directory | [Description]
Tellurium tetrabromide is a iron-gray crystalline substance; stable even in moist air. Decomposes on heating, giving off I2. Hydrolyzed slowly in cold water, rapidly in warm water, forming TeO2 and HI.
| [Chemical Properties]
Yellow crystals. Soluble in a little water (decomposes in excess
water). | [Uses]
Tellurium tetrabromide?it acts as a chemical and organic intermediate. It is also acts a conductor. | [Preparation]
Pure Te (5 g.) is introduced through adapter a into the elongated reaction flask A of the apparatus shown in Fig.1. Adapter a is connected to a N2 purification train which furnishes either pure dry N2 or N2 containing bromine vapor. For the latter, the gas stream may be passed through a wash bottle containing dry Br2 , followed by a U tube containing P2O5-glass wool. First, the apparatus in purged with pure N2. Then A is cooled with ice water and the N2 -Br2 mixture is introduced. A portion of the Br2 condenses on the Te and reacts quietly with it, while the remainder is retained in the empty U tube D, cooled with an ice-salt mixture. The difference between the weight loss of the Br2 wash bottle and the weight of the condensate in D indicates the amount of bromine remaining in A. When this becomes about twice the amount needed for quantitative conversion to TeBr4, the gas stream is interrupted, stopcock C is closed, and the product slurry is allowed to stand at room temperature for several hours (better overnight) in order to complete the reaction. Then C is reopened and the excess bromine is purged by a stream of N2 while A is simultaneously heated to 50℃. To purify the product, it is sublimed in vacuum. Gas inlet tube a is sealed off at d, the whole apparatus is tilted to a horizontal position, and ground glass joint E is connected to an aspirator through a P2O5 drying tube. During evacuation, A is heated to sublimation temperature (about 350℃) with an electric furnace. Any black condensate which may separate in B at 200℃ is vaporized by heating with a burner. The subsequently deposited yellow to orange-red powder is quite pure TeBr4; if necessary, this can be further purified by an analogous sublimation in high vacuum.
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