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426296

Sigma-Aldrich

Tetramethylammonium bromide

ACS reagent grade, ≥98.0%, powder

Synonym(s):

N,N,N-trimethyl-methanaminium bromide, TMAB

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25 G
$50.90
100 G
$77.67

About This Item

Linear Formula:
(CH3)4N(Br)
CAS Number:
Molecular Weight:
154.05
Beilstein/REAXYS Number:
3620955
EC Number:
MDL number:
UNSPSC Code:
12352100
PubChem Substance ID:
NACRES:
NA.21
Assay:
≥98.0%
Grade:
ACS reagent
Form:
powder

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$50.90


Estimated to ship onJuly 09, 2025Details


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Product Name

Tetramethylammonium bromide, ACS reagent, ≥98.0%

grade

ACS reagent

Quality Level

assay

≥98.0%

form

powder

impurities

≤0.5% trimethylamine hydrobromide
≤0.5% trimethylamine

mp

>300 °C (lit.)

functional group

amine

SMILES string

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

InChI

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

InChI key

DDFYFBUWEBINLX-UHFFFAOYSA-M

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1 of 4

This Item
14002342628853272
form

powder

form

crystalline

form

solid

form

solid

assay

≥98.0%

assay

98%

assay

≥98.0%

assay

≥98.0% (AT)

Quality Level

200

Quality Level

200

Quality Level

200

Quality Level

100

grade

ACS reagent

grade

reagent grade

grade

ACS reagent

grade

-

impurities

≤0.5% trimethylamine hydrobromide

impurities

≤2% triethylamine hydrobromide

impurities

≤0.5% tributylamine hydrobromide

impurities

-

mp

>300 °C (lit.)

mp

285 °C (dec.) (lit.)

mp

102-106 °C (lit.)

mp

-

General description

Tetrabutylammonium bromide is a quaternary ammonium compound that is widely used as a phase transfer catalyst.[1] Absolute viscosities of its aqueous solutions have been measured at various temperatures (20,25 and 30°C).[2] Various physical properties (activity coefficient up to saturation, conductance, density and solubility in water) of TMABr have been evaluated.[3]

Application

Tetrabutylammonium bromide (TBAB) may be used in the molten state in the following processes:
  • Synthesis of (2S)-5-(3-phenyl-2-phthalimidylpropanoylamino)isophthalic acid.[4]
  • Synthesis of alkyl-substituted pyrroles in the absence of catalyst and organic solvent.[5]
  • Synthesis of dithioacetals from acetals by transthioacetalisation in a solvent free environment.[6]
  • Synthesis of polyamides (PAs) by the polymerization of terephthalic acid and diisocyanates.[7]
  • Catalyze the addition of thiols to conjugated alkenes.[8]
  • Dehydrochlorination of poly(vinyl chloride).[9]

pictograms

Skull and crossbones

signalword

Danger

hcodes

Hazard Classifications

Acute Tox. 2 Oral

Storage Class

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

wgk_germany

WGK 3

flash_point_f

Not applicable

flash_point_c

Not applicable

ppe

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


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