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ChemicalBook--->CAS DataBase List--->10031-27-3

10031-27-3

10031-27-3 Structure

10031-27-3 Structure
IdentificationMore
[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 PropertiesBack 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 DataBack 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 InformationBack 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. preparation of TELLURIUM TETRABROMIDE
Well-known Reagent Company Product InformationBack Directory
[Alfa Aesar]

Tellurium(IV) bromide, ultra dry, 99.999% (metals basis)(10031-27-3)
[Sigma Aldrich]

10031-27-3(sigmaaldrich)
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