426296

Tetramethylammonium bromide

ACS reagent grade, ≥98.0%, powder

• Synonym(s): N,N,N-trimethyl-methanaminium bromide, TMAB
• Linear Formula: (CH₃)₄N(Br)
• CAS Number: 64-20-0
• Molecular Weight: 154.05
• Beilstein/REAXYS Number: 3620955
• EC Number: 200-581-2
• MDL number: MFCD00011626
• UNSPSC Code: 12352100
• PubChem Substance ID: 24866694
• NACRES: NA.21
• Assay: ≥98.0%
• Grade: ACS reagent
• Form: powder

Properties

• Product Name: Tetramethylammonium bromide, ACS reagent, ≥98.0%
• grade: ACS reagent
• Quality Level: 200
• 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

Description

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]

Safety Information

• pictograms: GHS06
• signalword: Danger
• hcodes: H300
• pcodes: P301 + P330 + P331 + P310
• 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