Tetraethylammonium bromide
Synonym(s):TEA bromide;TEAB;Tetraethylammonium bromide
- CAS NO.:71-91-0
- Empirical Formula: C8H20BrN
- Molecular Weight: 210.16
- MDL number: MFCD00011825
- EINECS: 200-769-4
- SAFETY DATA SHEET (SDS)
- Update Date: 2024-11-21 15:02:05
What is Tetraethylammonium bromide?
Chemical properties
white to light yellow crystalline solid
The Uses of Tetraethylammonium bromide
- Tetraethylammonium bromide (TEAB) catalyzes the synthesis of thioesters by the oxidative coupling of aldehydes or alcohols with thiols or disulfides.
- It is used as a catalyst, along with o-iodoxybenzoic acid (IBX), in the oxidation of sulfides to sulfoxides and primary carboxamides to one-carbon dehomologated nitriles.
- TEAB can also be used as an organic template to synthesize zeolite beta.
The Uses of Tetraethylammonium bromide
Tetraethylammonium Bromide can be used as a source of tetraethylammonium ions for various pharmaceutical studies. It has also the ability to block K+ channels in various tissues.
Crystal Structure
The crystal structure of Tetraethylammonium bromide has been determined and found to exhibit a distorted tetrahedral symmetry with respect to the geometry of the C atoms around the central N.
Preparation
Tetraethylammonium bromide is commercially available, but can be prepared by the reaction between tetraethylammonium hydroxide and hydrobromic acid:
Et4N+HO- + HBr → Et4N+Br- + H2O
Toxicity
The toxicity of tetraethylammonium bromide is primarily due to the tetraethylammonium ion, which has been studied extensively. LD50 for mouse: 38 mg/kg, i.v.; 60 mg/kg, i.p.; >2000 mg/kg, p.o.
General Description
The use of ion-pairing reagents as mobile phase additives allows the separation of ionic and highly polar substances on reversed phase HPLC columns. The purity of mobile phase additives is of utmost importance to their successful application. Sigma-Aldrich offers an outstanding range of tailor-made reagents for anionic (quaternary ammonium and phosphonium salts) and cationic (alkanesulfonates) determination. All mobile phase additives are subject to rigorous testing with special emphasis on the requirements of modern reversed phase HPLC:
Purification Methods
Recrystallise the bromide from EtOH, CHCl3 or diethyl ether, or recrystallise it from acetonitrile and dry it over P2O5 under reduced pressure for several days. It also recrystallises from EtOH/diethyl ether (1:2), EtOAc, water or boiling MeOH/acetone (1:3) or by adding an equal volume of acetone and allowing to cool. Dry it at 100o in vacuo for 12 days, and store over P2O5. [Beilstein 4 IV 332.]
Properties of Tetraethylammonium bromide
Melting point: | 285 °C (dec.)(lit.) |
Density | 1,397 g/cm3 |
vapor density | 5.3 (vs air) |
refractive index | 1,442-1,444 |
storage temp. | Store below +30°C. |
solubility | acetonitrile: 0.1 g/mL warm, clear, colorless |
form | Liquid |
color | White to cream |
PH | 6.5 (100g/l, H2O, 20℃) |
Odor | Odorless |
PH Range | 6.5 at 100 g/l |
Water Solubility | 2795 g/L (25 º C) |
Sensitive | Hygroscopic |
Merck | 14,9199 |
BRN | 3563430 |
Stability: | Stable. Incompatible with strong oxidizing agents. |
CAS DataBase Reference | 71-91-0(CAS DataBase Reference) |
NIST Chemistry Reference | Tetraethylammonium bromide(71-91-0) |
EPA Substance Registry System | Ethanaminium, N,N,N-triethyl-, bromide (71-91-0) |
Safety information for Tetraethylammonium bromide
Signal word | Warning |
Pictogram(s) |
Exclamation Mark Irritant GHS07 |
GHS Hazard Statements |
H412:Hazardous to the aquatic environment, long-term hazard |
Precautionary Statement Codes |
P273:Avoid release to the environment. P501:Dispose of contents/container to..… |
Computed Descriptors for Tetraethylammonium bromide
InChIKey | HWCKGOZZJDHMNC-UHFFFAOYSA-M |
Abamectin manufacturer
JSK Chemicals
Dishman Carbogen Amcis Ltd (Dishman Group)
Kenoor Organics Private Limited
Delta Finochem Pvt Ltd
Rivashaa Agrotech Biopharma Pvt. Ltd.
Tritech Catalyst and Intermediate Pvt Ltd
Tatva Chintan Pharma Chem Limited
SLS Pharmaceuticals Private Limited
New Products
4-Aminotetrahydropyran-4-carbonitrile Hydrochloride (R)-3-Aminobutanenitrile Hydrochloride 4-AMINO-TETRAHYDRO-PYRAN-4-CARBOXYLIC ACID HCL 4-(Dimethylamino)tetrahydro-2H-pyran-4-carbonitrile 3-((Dimethylamino)methyl)-5-methylhexan-2-one oxalate 1,4-Dioxa-8-azaspiro[4.5]decane 5-Bromo-2-nitropyridine Nimesulide BP Aceclofenac IP/BP/EP Diclofenac Sodium IP/BP/EP/USP Mefenamic Acid IP/BP/EP/USP Ornidazole IP Diclofenac Potassium SODIUM AAS SOLUTION ZINC AAS SOLUTION BUFFER SOLUTION PH 10.0(BORATE) GOOCH CRUCIBLE SINTERED AQUANIL 5 BERYLLIUM AAS SOLUTION 2-Bromo-1-(bromomethyl)-3-chloro-5-nitrobenzene 2-Bromo-3-nitroaniline N-(3-Hydroxypropyl)-N-methylacetamide 3-Bromo-6-chloropyridazine 4-ethyl-3-nitrobenzoic acidRelated products of tetrahydrofuran
You may like
-
Tetra Ethyl Ammonium Bromide 99%View Details
71-91-0 -
Tetraethylammonium Bromide CAS 71-91-0View Details
71-91-0 -
Tetraethylammonium Bromide (TEAB) pure CAS 71-91-0View Details
71-91-0 -
Tetraethylammonium bromide CAS 71-91-0View Details
71-91-0 -
Tetraethylammonium bromide, ≥99.5% CAS 71-91-0View Details
71-91-0 -
Tetraethylammonium bromide CAS 71-91-0View Details
71-91-0 -
Tetra Ethyl Ammonium Bromide CAS 71-91-0View Details
71-91-0 -
Tetraethylammonium bromide 98% CASView Details