NaPF6

Sodium hexafluorophosphate, with the chemical formula NaPF6, is an inorganic salt. It is the sodium salt of hexafluorophosphoric acid. NaPF6 typically appears as a white crystalline solid. It is known for its solubility in water, where it dissociates into sodium ions (Na+) and hexafluorophosphate anions (PF6-). The hexafluorophosphate anion is a relatively large, weakly coordinating anion, which makes NaPF6 useful in certain electrochemical applications.

This compound is often encountered as an electrolyte component in non-aqueous batteries, particularly lithium-ion batteries. Its stability and ability to dissolve common organic solvents used in electrolytes contribute to its utility in this field. NaPF6 can also be used as a precursor for the synthesis of other hexafluorophosphate salts. In laboratory settings, it may be employed as a source of the PF6- anion for various chemical reactions and studies. Care should be taken when handling NaPF6 as it can react with moisture to release toxic and corrosive hydrogen fluoride.