Tetramethylammonium bromide
Synonym(s):TBAB
- CAS NO.:64-20-0
- Empirical Formula: C4H12BrN
- Molecular Weight: 154.05
- MDL number: MFCD00011626
- EINECS: 200-581-2
- SAFETY DATA SHEET (SDS)
- Update Date: 2024-01-16 16:12:45
What is Tetramethylammonium bromide?
Chemical properties
SLIGHTLY GREY CRYSTALLINE POWDER
The Uses of Tetramethylammonium bromide
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.
The Uses of Tetramethylammonium bromide
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.]
Properties of Tetramethylammonium bromide
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 for Tetramethylammonium bromide
Signal word | Danger |
Pictogram(s) |
Skull and Crossbones Acute Toxicity GHS06 |
GHS Hazard Statements |
H300:Acute toxicity,oral |
Computed Descriptors for Tetramethylammonium bromide
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ACME SUJAN CHEMICALS
Tatva Chintan Pharma Chem Limited
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