Tetraethyl ammonium hydroxide
Tetraethylammonium hydroxide
CAS: 77-98-5
Molecular Formula: C8H21NO
Tetraethyl ammonium hydroxide - Names and Identifiers
| Name | Tetraethylammonium hydroxide |
| Synonyms | AI3-24479 IPC-TEA-OH TEA HYDROXIDE TETRAETHYLAMMONIUM HYDROXIDE Tetraethylammonium hydroxide Tetraethyl ammonium hydroxide Tetraethylamminonium hydroxide Ammonium, tetraethyl-, hydroxide N,N,N-triethylethanaminium hydroxide Ethanaminium, N,N,N-triethyl-, hydroxide TETRAETHYLAMMONIUM HYDROXIDE SOLUTION,~1 .0 M IN WATER |
| CAS | 77-98-5 |
| EINECS | 201-073-3 |
| InChI | InChI=1/C8H20N.H2O/c1-5-9(6-2,7-3)8-4;/h5-8H2,1-4H3;1H2/q+1;/p-1 |
| InChIKey | LRGJRHZIDJQFCL-UHFFFAOYSA-M |
Tetraethyl ammonium hydroxide - Physico-chemical Properties
| Molecular Formula | C8H21NO |
| Molar Mass | 147.26 |
| Density | 1.023g/mLat 25°C |
| Melting Point | -98C |
| Boling Point | 110 °C |
| Flash Point | 11 °C |
| Water Solubility | SOLUBLE |
| Appearance | Solution |
| Color | colorless to yellow |
| Merck | 14,9201 |
| BRN | 3912961 |
| PH | >13 (H2O, 20°C) |
| Storage Condition | 2-8°C |
| Stability | Stable, but absorbs carbon dioxide from the air |
| Sensitive | Air Sensitive |
| Refractive Index | n20/D 1.422 |
| Physical and Chemical Properties | Density 1.041 boiling point 110°C flash point 11°C water-SOLUBLE solution |
| Use | Used as phase transfer catalyst, molecular sieve Synthesis template and cleaning agent |
Tetraethyl ammonium hydroxide - Risk and Safety
| Risk Codes | R34 - Causes burns R51 - Toxic to aquatic organisms R39/23/24/25 - R23/24/25 - Toxic by inhalation, in contact with skin and if swallowed. R11 - Highly Flammable R35 - Causes severe burns |
| Safety Description | S7 - Keep container tightly closed. S16 - Keep away from sources of ignition. S26 - In case of contact with eyes, rinse immediately with plenty of water and seek medical advice. S36/37/39 - Wear suitable protective clothing, gloves and eye/face protection. S45 - In case of accident or if you feel unwell, seek medical advice immediately (show the label whenever possible.) S61 - Avoid release to the environment. Refer to special instructions / safety data sheets. S36/37 - Wear suitable protective clothing and gloves. |
| UN IDs | UN 3286 3/PG 2 |
| WGK Germany | 3 |
| RTECS | KH3150000 |
| FLUKA BRAND F CODES | 9-34 |
| TSCA | Yes |
| HS Code | 29239000 |
| Hazard Class | 8 |
| Packing Group | II |
Tetraethyl ammonium hydroxide - Reference Information
| EPA chemical substance information | information provided by: ofmpeb.epa.gov (external link) |
| Overview | tetraethyl ammonium hydroxide is a kind of organic quaternary ammonium base, the commodity exists in the form of methanol and aqueous solution, colorless to light yellow liquid at room temperature, with strong alkaline, can absorb carbon dioxide in the air, heating decomposition. In the field of industrial research has a very wide range of applications. It is used as phase transfer catalyst, template for synthesis of molecular sieve, cleaning agent and impurity removal agent for petroleum industry. N,N-diethylaniline was synthesized from aniline and bromoethane with tetraethylammonium hydroxide as phase transfer catalyst at atmospheric pressure. |
| preparation of tetraethyl ammonium hydroxide by electrolysis | the principle of preparation of tetraethyl ammonium hydroxide by electrolysis is that the tetraethyl ammonium chloride aqueous solution in the anode chamber of the electrolytic cell is under the action of electric field force, the chloride ions in the solution migrate in the anode direction until the discharge on the anode to precipitate chlorine. At the same time, due to the selective permeability of the ion exchange membrane, chloride ions cannot diffuse through the ion exchange membrane, and only tetraethylammonium ions can selectively penetrate into the cathode chamber and are enriched therein. The water molecules in the cathode compartment of the electrolytic cell are decomposed into hydrogen and hydroxide ions at the cathode. The latter is combined with the tetraethylammonium ions which migrate from the anode compartment to form tetraethylammonium hydroxide. The concentration of tetraethylammonium hydroxide increased with the increase of the amount of electricity, and finally reached the expected crude concentration. Anode electrochemical reaction:(C2H5)4NCl →(C2H5)4N Cl ˉ 2Cl ˉ- 2e → Cl2 cathode electrochemical reaction: H2O → H OH ↑ (C2H5)4 OH → →(C2H5)4OH2H 2e → H2 ↑ Total reaction: 2(C2H5)4NCl 2H2O → 2(C2H5)4OH H2 ↑ Cl2, the generated chlorine gas is absorbed by alkali solution to generate sodium hypochlorite, which is the main raw material of bleaching powder. Therefore, the method for preparing tetraethyl ammonium hydroxide is simple, high purity and no environmental pollution. |
| determination of critical micelle concentration of aqueous solution | The second and second critical micelle concentrations (CMC) of tetraethyl ammonium hydroxide aqueous solution were measured by conductivity method, the values are 0.52 and 38.0 mmol/L, respectively. At the same time, the electrochemical behavior of tetraethylammonium hydroxide aqueous solution micelles on platinum electrode (Pt) was studied by cyclic voltammetry (CV) under the condition of no probe molecule, and a diffusion controlled oxidation peak was obtained, the diffusion coefficients of the micelles were measured by potential step chronocoupling (CC) method. The first and second critical micelle concentrations of tetraethyl ammonium hydroxide were 0.52 and 41.0 mmol/L, respectively. The first and second critical micelle concentrations of tetraethylammonium hydroxide were determined to be 0.52 and 39.5 mmol/L, respectively. The conductivity method and the time-Coulomb method have their own characteristics, which are good methods for determining the critical micelle concentration of surfactants. SOURCE: Journal of Applied Chemistry, Issue 4, 2007 |
| Use | as a phase transfer catalyst, template and cleaning agent for molecular sieve synthesis phase transfer catalyst or Electronic Industry |
| category | corrosive article |
| toxicity grade | high toxicity |
| Acute toxicity | subcutaneous-mouse LDL0: 107 mg/kg |
| explosive hazard characteristics | corrosive to skin and cornea |
| flammability hazard characteristics | Thermal decomposition, toxic vapor; combustion emissions of toxic nitrogen oxides and ammonia fumes |
| storage and transportation characteristics | The warehouse is ventilated and dried at low temperature; It is stored separately from acids. |
| fire extinguishing agent | water, sand, foam, carbon dioxide |
Last Update：2024-04-09 21:21:28
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