Ammonium hexafluorophosphate, with the chemical formula (NH4)3PF6, is a chemical compound composed of ammonium ions (NH4+) and hexafluorophosphate ions (PF6^-). It is also known as ammonium fluorophosphate.

Ammonium hexafluorophosphate is a white crystalline solid that is sparingly soluble in water. It has several key properties and uses:

1. Electroplating: Ammonium hexafluorophosphate is used in electroplating processes, particularly in the electrodeposition of metal films. It serves as a source of fluoride ions, which assist in the deposition of metal coatings on various substrates.
2. Catalyst in Organic Synthesis: It can be used as a catalyst in certain organic synthesis reactions.
3. Ion Exchange Resins: Ammonium hexafluorophosphate is used in the preparation of some ion exchange resins.
4. Inorganic Fluoride Source: It is used as a source of inorganic fluoride ions in various chemical reactions.

Ammonium hexafluorophosphate is generally considered safe to handle under normal conditions. However, it should be handled with care, and proper safety precautions should be followed to avoid unnecessary exposure.

As a fluoride source in electroplating and organic synthesis, ammonium hexafluorophosphate is an important chemical in various industrial applications. Its ability to provide fluoride ions makes it valuable in processes where fluoride reactivity is needed, such as in metal deposition and catalysis.