Wikipedia
Sodium bifluoride
Sodium bifluoride is the inorganic compound with the formula NaHF. It is a salt of sodium cation (Na) and bifluoride anion (HF). It is a white, water-soluble solid that decomposes upon heating . Sodium bifluoride is non-flammable, hygroscopic, and has a pungent smell. Sodium bifluoride has a number of applications in industry.