Tetraethylammonium bromide is an organic compound with the formula (C2H5)4NBr, appearing as white crystals. It is hygroscopic and readily dissolves in water, ethanol, chloroform, and acetone, while showing slight solubility in benzene. Its water solubility at 25°C is 2795 g/L. A 10% aqueous solution has a pH of 6.5, which remains stable when heated to 95°C for 28 hours. The compound is irritating and is primarily used as a polarographic reagent and pesticide intermediate, as well as for testing precious metals such as gold, iridium, palladium, rhodium, and ruthenium.
Tetraethylammonium bromide Chemical Properties
| 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 |
| Odor | Odorless |
| PH Range | 6.5 at 100 g/l |
| PH | 6.5 (100g/l, H2O, 20℃) |
| Water Solubility | 2795 g/L (25 º C) |
| Sensitive | Hygroscopic |
| Merck | 149,199 |
| BRN | 3563430 |
| Stability | Stable. Incompatible with strong oxidizing agents. |
| InChIKey | HWCKGOZZJDHMNC-UHFFFAOYSA-M |
| 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
| Hazard Codes | Xi |
| Risk Statements | 36/37/38 |
| Safety Statements | 26-36-37/39 |
| WGK Germany | 3 |
| RTECS | BS5950000 |
| F | 3 |
| TSCA | Yes |
| HS Code | 29239000 |
Used as a phase transfer catalyst in organic synthesis, a curing accelerator for polymerization, an organic electrolyte in the electronics industry, and an agent in oilfield chemicals. It also serves as a molecular sieve template, phase change cold storage material, high-performance liquid chromatography reagent, surfactant, descaling agent, adsorbent, and oil displacement agent.
