Lithium hexafluorophosphate

Lithium hexafluorophosphate
IUPAC name
lithium hexafluorophosphate
21324-40-3 YesY
3D model (Jmol) Interactive image
ChemSpider 146939 YesY
ECHA InfoCard 100.040.289
PubChem 23688915
Molar mass 151.905 g/mol
Appearance white powder
Density 1.5 g/cm3
Melting point 200 °C (392 °F; 473 K)
Safety data sheet External MSDS
GHS pictograms
GHS signal word DANGER
P280, P310, P305+351+338
R-phrases R22, R24, R34
S-phrases S26, S36, S37, S39, S45
Flash point Non-flammable
Related compounds
Other anions
Lithium tetrafluoroborate
Other cations
Sodium hexafluorophosphate
Potassium hexafluorophosphate
Ammonium hexafluorophosphate
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
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Infobox references

Lithium hexafluorophosphate is an inorganic compound with the formula LiPF6. It is a white crystalline powder. It is used in commercial secondary batteries, an application that exploits its high solubility in nonpolar solvents. Specifically, solutions of lithium hexafluorophosphate in propylene carbonate and dimethoxyethane serve as an electrolyte in lithium batteries.[1] This application also exploits the inertness of the hexafluorophosphate anion toward strong reducing agents, such as lithium metal.

The salt is relatively stable thermally, but loses 50% weight at 200 °C (392 °F). It hydrolyzes near 70 °C (158 °F)[2] according to the following equation:

LiPF6 + H2O → HF + PF5 + LiOH

Owing to the Lewis acidity of the Li+ ions, LiPF6 also catalyses the tetrahydropyranylation of tertiary alcohols.[3]


  1. Goodenough, John B.; Kim, Youngsik (9 February 2010). "Challenges for Rechargeable Li Batteries". Chemistry of Materials. 22 (3): 587–603. doi:10.1021/cm901452z.
  2. Xu, Kang (October 2004). "Nonaqueous Liquid Electrolytes for Lithium-Based Rechargeable Batteries". Chemical Reviews. 104 (10): 4303–4418. doi:10.1021/cr030203g.
  3. Nao Hamada; Sato Tsuneo (2004). "Lithium Hexafluorophosphate-Catalyzed Efficient Tetrahydropyranylation of Tertiary Alcohols under Mild Reaction Conditions". Synlett (10): 1802. doi:10.1055/s-2004-829550.
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