TETRAETHYLAMMONIUM TETRAFLUOROBORATE
Tetraethylammonium tetrafluoroborate
CAS: 429-06-1
Molecular Formula: C8H20BF4N
TETRAETHYLAMMONIUM TETRAFLUOROBORATE - Names and Identifiers
| Name | Tetraethylammonium tetrafluoroborate |
| Synonyms | TEATFB N2,2,2,2BF4 TETRAETHYLAMMONIUM FLUOROBORATE Tetraethylammonium tetrafluoroborate TETRAETHYLAMMONIUM TETRAFLUOROBORATE Tetraethylammonium tetrafluoroboratee TETRAETHYLAMMONIUM TETRAFLUOROBORATE FOR N,N,N-Triethylethanaminium tetrafluoroborate Ethanaminium, N,N,N-triethyl-, tetrafluoroborate(1-) |
| CAS | 429-06-1 |
| EINECS | 207-055-1 |
| InChI | InChI=1/C8H20N.BF4/c1-5-9(6-2,7-3)8-4;2-1(3,4)5/h5-8H2,1-4H3;/q+1;-1 |
| InChIKey | VDMMJVHZGWXBJN-UHFFFAOYSA-M |
TETRAETHYLAMMONIUM TETRAFLUOROBORATE - Physico-chemical Properties
| Molecular Formula | C8H20BF4N |
| Molar Mass | 217.06 |
| Density | 1.23 at 20℃ |
| Melting Point | ≥300°C(lit.) |
| Water Solubility | Soluble in water, alcohol and acetonitrile. |
| Solubility | acetonitrile: 0.1g/mL, clear, colorless |
| Vapor Presure | 0-0Pa at 20-25℃ |
| Appearance | White crystalline powder |
| Color | White |
| BRN | 3917638 |
| Storage Condition | Store below +30°C. |
| Sensitive | Hygroscopic |
| MDL | MFCD00011827 |
| Physical and Chemical Properties | Melting Point: 300 |
TETRAETHYLAMMONIUM TETRAFLUOROBORATE - Risk and Safety
| Risk Codes | R20/21/22 - Harmful by inhalation, in contact with skin and if swallowed. R36/37/38 - Irritating to eyes, respiratory system and skin. |
| Safety Description | S26 - In case of contact with eyes, rinse immediately with plenty of water and seek medical advice. S36 - Wear suitable protective clothing. |
| UN IDs | 2811 |
| WGK Germany | 3 |
| TSCA | Yes |
| HS Code | 29239000 |
| Hazard Note | Irritant/Hygroscopic |
| Hazard Class | 6.1 |
| Packing Group | III |
TETRAETHYLAMMONIUM TETRAFLUOROBORATE - Nature
| melting point | ≥300 °C(lit.) |
| storage conditions | Store below 30°C. |
| solubility | acetonitrile: 0.1 g/mL, clear, colorless |
| morphology | Crystals or Crystalline Powder |
| color | White |
| water solubility | Soluble in water, alcohol and acetonitrile. |
| sensitivity | Hygroscopic |
| BRN | 3917638 |
| InChIKey | VDMMJVHZGWXBJN-UHFFFAOYSA-M |
Last Update：2024-04-10 22:29:15
TETRAETHYLAMMONIUM TETRAFLUOROBORATE - Reference Information
| LogP | -3.5 at 20.2℃ and pH7 |
| surface tension | 72.07mN/m at 1g/L and 20 ℃ |
| EPA chemical information | Information provided by: ofmpub.epa.gov (external link) |
| Introduction | Tetraethyl ammonium tetrafluoroborate (Et4NBF4) is a white to white crystal with low density, high melting point, low viscosity, stable and good conductivity properties. As an electrolyte salt, Et4NBF4 is widely used in organic electrolytes of supercapacitors, and has been applied and reported in many aspects such as lithium ion batteries, electrochemical experimental analysis and pharmaceutical intermediates. |
| preparation | (1), refining boric acid: the specific operation is as follows: dissolve industrial boric acid in boiled deionized water, then filter, the filtrate is reduced to room temperature, crystallize, filter, wash with deionized water, then redissolve the filter cake in boiled deionized water, cool down, crystallize, and repeat the recrystallization process three times, refined boric acid can be obtained with a yield of 42 ~ 50%;(2) Preparation of fluoroboric acid: Weit 100ml of 40%(wt) hydrofluoric acid and add it to a polytetrafluoroethylene reactor with stirring, condensation reflux device and cooling coil. While stirring, 34.5 grams of boric acid is added in batches within 1 hour, the reaction temperature is 35 ℃, the addition of biboric acid continues to stir for half an hour, and then stops stirring and let stand at room temperature for 2 hours, filtration to remove non-substance impurities to obtain a fluoboric acid aqueous solution with a concentration of 33% ±;(3) Synthesis and refining of ammonium tetraethylfluoroborate: 25g of tetraethylammonium chloride and 50g of butanol are weighed and added to a polytetrafluoroethylene material In the reactor, the fluoroboric acid aqueous solution is slowly added dropwise at 30 ℃ for 2 hours, and then the temperature is raised to 40 ℃ to continue the reaction for 2 hours. After the reaction is over, the concentration is reduced pressure, and 25g of butanol is, stir for 2 hours for crystallization, filtration, and wash with butanol to remove the mother liquor with impurities to obtain wet powder -40g of tetraethyl ammonium tetrafluoroborate; put tetraethyl ammonium tetrafluoroborate wet powder into a container with a condensing reflux device containing 150ml of ethanol solution, heat up and boil, after the solids are completely dissolved, stir and cool down, cool to room temperature, and crystallialize and filter at room temperature, it was washed with ethanol solution at room temperature, and the recrystallization process was repeated twice. After vacuum drying, 21g of qualified ammonium tetraethyl tetrafluoroborate product was obtained with a yield of 64.2%(mol). |
Last Update：2024-04-10 22:31:16
TETRAETHYLAMMONIUM TETRAFLUOROBORATE - Introduction
Tetraethyltetrafluoroborate (Et4NBF4) is a white to white crystal with low density, high melting point, low viscosity, stability and good electrical conductivity. As electrolyte salts, Et4NBF4 are widely used in organic electrolytes of supercapacitors, and have been applied and reported in many aspects such as lithium ion batteries, electrochemical experimental analysis and pharmaceutical intermediates.
Last Update：2024-04-10 22:29:15
TETRAETHYLAMMONIUM TETRAFLUOROBORATE - Preparation
(1), refining of boric acid:
The specific operations are as follows:
Dissolve industrial boric acid in boiled deionized water, then filter, reduce the filtrate to room temperature, crystallize, filter, and wash with deionized water, then re-dissolve the filter cake in boiled deionized water, cool down, crystallize, and repeat the recrystallization process three times to obtain refined boric acid with a yield of 42 ~ 50%;
(2) Preparation of fluoroboric acid:
weigh 100ml of 40%(wt) hydrofluoric acid and add it to a polytetrafluoroethylene reactor with stirring, condensation reflux device and cooling coil. add 34.5g of boric acid in batches within 1 hour while stirring. the reaction temperature is 35 ℃, add biboric acid to continue stirring for half an hour, then stop stirring and stand at room temperature for 2 hours, filter to remove impurities, and obtain a fluoboric acid aqueous solution;
(3) Synthesis and refining of ammonium tetraethylfluoroborate:
Weit 25g tetraethylammonium chloride and 50g butanol into a reactor made of polytetrafluoroethylene, slowly add fluoroboric acid aqueous solution dropwise within 2 hours at 30 ℃, and then raise the temperature to 40 ℃ to continue the reaction for 2 hours. After the reaction is over, concentrate under reduced pressure, add 25g butanol at room temperature, stir for 2 hours for crystallization, filtration, and wash with butanol, the obtained wet powder -40g of tetraethyl ammonium tetrafluoroborate; put the tetraethyl ammonium tetrafluoroborate wet powder into a container with a condensing reflux device filled with 150ml ethanol solution, heat up and boil, and wait for the solid After all dissolves, cool down while stirring, cool down to room temperature, and crystallize and filter at room temperature, wash with an ethanol solution at room temperature, repeat the recrystallization process twice, and dry, 21g of qualified ammonium tetraethyltetrafluoroborate product was obtained with a yield of 64.2%(mol).
Last Update：2024-04-10 22:29:15
TETRAETHYLAMMONIUM TETRAFLUOROBORATE - Security information
| dangerous goods mark | Xn,Xi |
| hazard category code | 20/21/22-36/37/38 |
| safety instructions | 26-36 |
| dangerous goods transport number | 2811 |
| WGK Germany | 3 |
| Hazard Note | Irritant/Hygroscopic |
| TSCA | Yes |
| HazardClass | 6.1 |
| PackingGroup | III |
| customs code | 29239000 |
Last Update：2024-04-10 22:29:15
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