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Documenti fondamentali

195758

Sigma-Aldrich

Tetramethylammonium bromide

98%

Sinonimo/i:

TMAB

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About This Item

Formula condensata:
(CH3)4N(Br)
Numero CAS:
Peso molecolare:
154.05
Beilstein:
3620955
Numero CE:
Numero MDL:
Codice UNSPSC:
12352100
ID PubChem:
NACRES:
NA.21
Saggio:
98%
Stato:
solid

Livello qualitativo

Saggio

98%

Stato

solid

Punto di fusione

>300 °C (lit.)

Gruppo funzionale

amine

Stringa SMILE

[Br-].C[N+](C)(C)C

InChI

1S/C4H12N.BrH/c1-5(2,3)4;/h1-4H3;1H/q+1;/p-1
DDFYFBUWEBINLX-UHFFFAOYSA-M

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Categorie correlate

Descrizione generale

Tetrabutylammonium bromide is a quaternary ammonium compound that is widely used as a phase transfer catalyst. Absolute viscosities of its aqueous solutions have been measured at various temperatures (20,25 and 30°C). Various physical properties (activity coefficient up to saturation, conductance, density and solubility in water) of TMABr have been evaluated.
Tetramethylammonium bromide (TMABr) is a quaternary ammonium salt that is widely used as a phase transfer catalyst. Absolute viscosities of its aqueous solutions have been measured at various temperatures (20,25 and 30°C). Various physical properties (activity coefficient up to saturation, conductance, density and solubility in water) of TMABr have been evaluated. Its impact on the first order rate constant values for the base hydrolysis of the following Fe(II) chelates has been investigated:




  • bis(naphthylidene alanate) (nali)
  • bis(naphthylidene phenylalanate) (nphali)
  • bis(naphthylidene aspartate) (nasi)
  • (naphthylidene histidinate) (nhi)
  • bis(naphthylidenearginate) (nari)

Applicazioni

Tetrabutylammonium bromide may be used in the molten state in the following processes:
  • Synthesis of (2S)-5-(3-phenyl-2-phthalimidylpropanoylamino)isophthalic acid.
  • Synthesis of alkyl-substituted pyrroles in the absence of catalyst and organic solvent.
  • Synthesis of dithioacetals from acetals by transthioacetalisation in a solvent free environment.
  • Synthesis of polyamides (PAs) by the polymerization of terephthalic acid and diisocyanates.
  • Catalyze the addition of thiols to conjugated alkenes.
  • Dehydrochlorination of poly(vinyl chloride).
Tetramethylammonium bromide may be used as a template in the synthesis of small colloidal zeolite Y nanocrystals.

Pittogrammi

Skull and crossbones

Avvertenze

Danger

Indicazioni di pericolo

Classi di pericolo

Acute Tox. 2 Oral

Codice della classe di stoccaggio

6.1A - Combustible acute toxic Cat. 1 and 2 / very toxic hazardous materials

Classe di pericolosità dell'acqua (WGK)

WGK 3

Punto d’infiammabilità (°F)

Not applicable

Punto d’infiammabilità (°C)

Not applicable

Dispositivi di protezione individuale

Eyeshields, Faceshields, Gloves, type P2 (EN 143) respirator cartridges


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I clienti hanno visto anche

Controlling size and yield of zeolite Y nanocrystals using tetramethylammonium bromide.
Holmberg BA, et al.
Microporous and Mesoporous Materials : The Official Journal of the International Zeolite Association, 59(1), 13-28 (2003)
Viscosity of aqueous solutions. III. Tetramethylammonium bromide and the role of the tetraalkylammonium ions.
Nightingale Jr ER.
The Journal of Physical Chemistry, 66(5), 894-897 (1962)
Dehydrochlorination of poly (vinyl chloride) by aqueous sodium hydroxide solution under two-phase conditions.
Kise H.
Journal of Polymer Science, 20(11), 3189-3197 (1982)
Some physical properties of aqueous solutions of tetramethylammonium bromide and tetramethylammonium iodide
Levien BJ.
Australian Journal of Chemistry, 18(8), 1161-1170 (1965)
Kinetic study of the base-catalyzed hydrolysis of novel high-spin hydrophobic Fe(II)-azomethine amino acid chelates: Salt and structure effects on the reactivity
Russian Journal of General Chemistry, 85, 168-172 (2015)

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