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Ammonium hexafluorophosphate

Ammonium hexafluorophosphate
Ammonium hexafluorophosphate.png
Ball-and-stick model of the ammonium cation
Ball-and-stick model of the hexafluorophosphate anion
IUPAC name
ammonium hexafluorophosphate
3D model (JSmol)
ECHA InfoCard 100.037.266
EC Number
  • 241-009-1
Molar mass 163.00264
Appearance white solid
Density 2.180 g/cm3
74.8 g/100 mL(20 °C)
Safety data sheet Oxford MSDS
GHS pictograms GHS05: Corrosive
GHS Signal word Danger
P260, P264, P280, P301+330+331, P303+361+353, P304+340, P305+351+338, P310, P321, P363, P405, P501
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

Ammonium hexafluorophosphate is the inorganic compound with the formula NH4PF6. It is a white water-soluble, hygroscopic solid. The compound is a salt consisting of the ammonium cation and hexafluorophosphate anion. It is commonly used as a source of the hexafluorophosphate anion, a weakly coordinating anion. It is prepared by combining neat ammonium fluoride and phosphorus pentachloride. Alternatively it can also be produced from phosphonitrilic chloride:[1]

PCl5 + 6 NH4F → NH4PF6 + 5 NH4Cl
PNCl2 + 6 HF → NH4PF6 + 2 HCl


  1. ^ W. Kwasnik (1963). "Ammonium Hexafluorophosphate (V)". In G. Brauer (ed.). Handbook of Preparative Inorganic Chemistry, 2nd Ed. 1. NY, NY: Academic Press. pp. 195–196.