Tetramethylammonium bromide Chemical Properties

Melting point:

>300 °C (lit.)

Boiling point:

>360°C

Density 

1,56 g/cm³

refractive index 

1.4379 (estimate)

storage temp. 

Store below +30°C.

solubility 

H₂O: 0.1 g/mL, clear, colorless

form 

Crystalline Powder

color 

Slightly gray

PH

5.5-6.5 (100g/l, H2O)

Odor

Odorless

Water Solubility 

soluble

Sensitive 

Hygroscopic

λmax

λ: 240 nm Amax: 0.06
λ: 250 nm Amax: 0.03
λ: 260 nm Amax: 0.02
λ: 500 nm Amax: 0.02

BRN 

3620955

CAS DataBase Reference

64-20-0(CAS DataBase Reference)

NIST Chemistry Reference

Tetramethylammonium bromide(64-20-0)

EPA Substance Registry System

Methanaminium, N,N,N-trimethyl-, bromide (64-20-0)

Safety Information

Hazard Codes 

T

Risk Statements 

25-36/37/38

Safety Statements 

26-28-36-45-37/39-28A

RIDADR 

UN 2811 6.1/PG 2

WGK Germany 

3

RTECS 

BS7600000

TSCA 

Yes

HazardClass 

6.1

PackingGroup 

II

HS Code 

29239000

MSDS

• Language:English Provider:Tetramethylammonium bromide
• Language:English Provider:SigmaAldrich
• Language:English Provider:ACROS

Tetramethylammonium bromide Usage And Synthesis

Chemical Properties

SLIGHTLY GREY CRYSTALLINE POWDER

Uses

Tetramethylammonium bromide acts as an ion pair reagent. It is used as a surface-active agent and an active ingredient for conditioners. Further, it is used as a softner for textiles and paper products. It is also employed as a disinfection agent, sanitizer, antimicrobial and antistatic agent. In addition to this, it plays in important role as a phase transfer catalyst in synthetic chemistry.

Uses

Tetrabutylammonium bromide (TBAB) 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).

Definition

ChEBI: The bromide salt of tetramethylammonium.

General Description

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.

Purification Methods

Crystallise the bromide from EtOH, EtOH/diethyl ether, MeOH/acetone, water or from acetone/MeOH (4:1) by adding an equal volume of acetone. It is dried at 110o under reduced pressure or at 140o for 24hours. [Beilstein 4 IV 145.]

Tetramethylammonium bromide(64-20-0)Related Product Information

• Ammonium bromide
• Calcium bromide
• Sodium bromate
• Tetramethylammonium chloride
• Ethidium bromide
• Tetrapropylammonium bromide
• Tetraethylammonium bromide
• TETRAMETHYLAMMONIUM BROMIDE 98+% &
• Tetrabutylammonium bromide
• Benzyldodecyldimethylammonium bromide
• Didecyldimethylammonium bromide
• TETRAMETHYLAMMONIUM BROMIDE PERBROMIDE
• Tetramethylammonium hydroxide pentahydrate
• N,N,N',N'-Tetramethylethylenediamine
• Tetramethylammonium acetate
• Tetramethylammonium iodide
• Tetramethylammonium nitrate
• TETRAMETHYLPHOSPHONIUM BROMIDE