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 prepared by combining neat ammonium fluoride and phosphorus pentachloride.

Alternatively it can also be produced from phosphonitrilic chloride:[1] This inorganic compound–related article is a stub.