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Tetrabutylammonium bromide

Physical and Chemical Properties Application Toxicity
Tetrabutylammonium bromide
Tetrabutylammonium bromide structure
Chemical Name:
Tetrabutylammonium bromide
TBAB;Bu4NBr;N4,4,4,4Br;IPC-TBA-BR;Tetrabutyl;aliquat 100;ALIQUAT(R) 100;FourbutylbroMide;Tetrabutylammonium b;Butyl AMoniuM BroMide
Molecular Formula:
Formula Weight:
MOL File:

Tetrabutylammonium bromide Properties

Melting point:
102-106 °C(lit.)
Boiling point:
102 °C
1.039 g/mL at 25 °C
refractive index 
n20/D 1.422
Flash point:
storage temp. 
Store at RT.
H2O: 0.1 g/mL, clear, colorless
Crystalline Powder
Specific Gravity
White to slightly cream
Water Solubility 
600 g/L (20 ºC)
λ: 240 nm Amax: 0.04
λ: 250 nm Amax: 0.03
λ: 260 nm Amax: 0.02
λ: 500 nm Amax: 0.02
Stable. Incompatible with strong oxidizing agents. Protect from moisture.
CAS DataBase Reference
1643-19-2(CAS DataBase Reference)
NIST Chemistry Reference
Tetra-N-butylammonium bromide(1643-19-2)
EPA Substance Registry System
1-Butanaminium, N,N,N-tributyl-, bromide(1643-19-2)
  • Risk and Safety Statements
  • Hazard and Precautionary Statements (GHS)
Hazard Codes  Xi,Xn
Risk Statements  36/37/38-22
Safety Statements  26-36-37/39
WGK Germany  3
Hazard Note  Irritant
HS Code  29239000
Signal word: Warning
Hazard statements:
Code Hazard statements Hazard class Category Signal word Pictogram P-Codes
H302 Harmful if swallowed Acute toxicity,oral Category 4 Warning P264, P270, P301+P312, P330, P501
H315 Causes skin irritation Skin corrosion/irritation Category 2 Warning P264, P280, P302+P352, P321,P332+P313, P362
H319 Causes serious eye irritation Serious eye damage/eye irritation Category 2A Warning P264, P280, P305+P351+P338,P337+P313P
H335 May cause respiratory irritation Specific target organ toxicity, single exposure;Respiratory tract irritation Category 3 Warning
Precautionary statements:
P261 Avoid breathing dust/fume/gas/mist/vapours/spray.
P264 Wash hands thoroughly after handling.
P264 Wash skin thouroughly after handling.
P270 Do not eat, drink or smoke when using this product.
P280 Wear protective gloves/protective clothing/eye protection/face protection.
P304+P340 IF INHALED: Remove victim to fresh air and Keep at rest in a position comfortable for breathing.
P305+P351+P338 IF IN EYES: Rinse cautiously with water for several minutes. Remove contact lenses, if present and easy to do. Continuerinsing.
P405 Store locked up.
P501 Dispose of contents/container to..…

Tetrabutylammonium bromide price More Price(25)

Manufacturer Product number Product description CAS number Packaging Price Updated Buy
Sigma-Aldrich 193119 Tetrabutylammonium bromide ReagentPlus , ≥99.0% 1643-19-2 25g $36.4 2018-11-13 Buy
Sigma-Aldrich 193119 Tetrabutylammonium bromide ReagentPlus , ≥99.0% 1643-19-2 5kg $1200 2018-11-13 Buy
TCI Chemical I0365 Tetrabutylammonium Bromide [Reagent for Ion-Pair Chromatography] >99.0%(T) 1643-19-2 25g $26 2018-11-22 Buy
TCI Chemical I0365 Tetrabutylammonium Bromide [Reagent for Ion-Pair Chromatography] >99.0%(T) 1643-19-2 100g $67 2018-11-22 Buy
Alfa Aesar A10249 Tetra-n-butylammonium bromide, 98+% 1643-19-2 500g $128 2018-11-13 Buy

Tetrabutylammonium bromide Chemical Properties,Uses,Production

Physical and Chemical Properties

Tetrabutylammonium bromide, also known as tetrabutylammonium bromide. White crystal, deliquescence. 118 ℃ melting point. Soluble in water, alcohol, ether and acetone, slightly soluble in benzene.

Figure 1:  a structural formula of tetrabutylammonium bromide


(1) Used as a reagent for the analysis of organic synthesis.
(2) Tetrabutylammonium bromide is also an effective phase transfer catalyst.
Phase transfer catalyst, referred to as PTC, is able to transfer the aqueous phase (or organic phase) to the organic phase (or aqueous phase) catalyst, which can make the reaction between the aqueous phase and the organic phase of the catalyst. PTC has the function of changing the degree of ion solvation, increasing the activity of ion reaction, speeding up the reaction rate and so on. Solve the problem of the past in the two phases of the reaction is difficult to react.
Common quaternary ammonium salt phase transfer catalysts are: benzyl triethyl ammonium chloride, trioctyl methyl ammonium chloride, tetramethyl ammonium bromide, tetrapropylammonium chloride, tetrabutylammonium bromide , tetrabutyl ammonium iodide, benzyl triethyl ammonium bromide, triethyl hexyl bromide, octyl triethylammonium bromide.
Phase transfer catalyst is widely applied in organic synthesis: R2C for preparing compounds (carbene type compound), further preparation of the corresponding nitrile, isonitrile, Halon, dichloromethane cyclopropane derivatives, hydroxy acids and diazomethane. For the alkylation reaction, compared with traditional methods, to avoid the harsh conditions of dry operation, and high yield, it can also be used in the redox reaction, ester hydrolysis, substitution reaction, condensation reaction, addition reaction, polymerization reaction, addition reaction of carbon and the elimination of reaction and so on.
(3) For organic synthesis intermediates, phase transfer catalyst
(4) Ion-pairing reagents for the synthesis of bacampicillin, sultamicillin like.
(5) Ion pair chromatography reagents, phase transfer catalyst. Bacampicillin, sultamicillin like synthesis.


The acute oral LD50 (mouse): 590mg/kg. Inhalation, ingestion and skin contact toxic to the skin, eyes and respiratory system irritation.
More information from the ChemicalBook Xiaonan editor (2015-09-16).

Chemical Properties

white crystals or powder


PTC catalyst 


ChEBI: A tetrabutylammonium salt with bromide as the anionic counterpart.

Purification Methods

Crystallise the salt from *benzene (5mL/g) at 80o by adding hot n-hexane (three volumes) and allowing to cool. Dry it over P2O5 or Mg(ClO4)2, under vacuum. The salt is very hygroscopic. It can also be crystallised from ethyl acetate or dry acetone by adding diethyl ether and dried in vacuo at 60o for 2 days. It has been crystallised from acetone by addition of diethyl ether. It is so hygroscopic that all manipulations should be carried out in a dry-box. It has been purified by precipitation from a saturated solution in dry CCl4 on addition of cyclohexane or by recrystallisation from ethyl acetate, then heating in vacuum to 75o in the presence of P2O5. [Symons et al. J Chem Soc, Faraday Trans 1 76 2251 1908.] It also recrystallises from CH2Cl2/diethyl ether and is dried in a vacuum desiccator over P2O5. [Blau & Espenson J Am Chem Soc 108 1962 1986, Beilstein 4 IV 657.]

Tetrabutylammonium bromide Preparation Products And Raw materials

Raw materials

Preparation Products

Tetrabutylammonium bromide Suppliers

Global( 496)Suppliers
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View Lastest Price from Tetrabutylammonium bromide manufacturers

Image Release date Product Price Min. Order Purity Supply Ability Manufacturer
2019-04-04 Tetrabutylammonium bromide
US $6.00 / kg 1kg High quality Professional Factory Ms Ella Chemwill Asia Co.,Ltd.
2019-04-10 Tetrabutylammonium bromide
US $1.00 / g 10g 99% min 100 Metric Ton/Metric Tons per Year Cangzhou Wanyou New Material Technology Co.,Ltd
2018-07-25 Tetrabutylammonium bromide
US $100.00 / KG 100G 98% 10KG,20KG career henan chemical co

Tetrabutylammonium bromide Spectrum

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