Tetrabutylammonium hexafluorophosphate is a salt with the formula NBu4PF6. It is a white powder that is used as an electrolyte in nonaqueous electrochemistry. It is highly soluble in polar organic solvents such as acetone and acetonitrile.
1-Butanaminium, N,N,N-tributyl-, hexafluorophosphate(1-)
3D model (JSmol)
|Melting point||244–246 °C (471–475 °F; 517–519 K)|
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
The salt consists of a positively charged tetrabutylammonium, a quaternary ammonia cation and a weakly basic hexafluorophosphate anion. These species are chemically inert, which allows the salt to serve as an inert electrolyte over a wide potential range. Given the sensitivity of electrochemical experiments, this salt is usually further purified, e.g., by recrystallization from aqueous or absolute ethanol.
- Zoski, Cynthia G. (2007). Handbook of Electrochemistry (1st ed.). Amsterdam: Elsevier.