Sodium fluoride, represented by the chemical formula NaF, is an inorganic and ionic chemical compound. It can be created by a reaction between hydrofluoric acid and sodium hydroxide.
When sodium fluoride dissolves, it ionizes to create a sodium ion with a charge of plus one and a fluorine ion with a charge of minus one. Sodium fluoride has a molar mass of 41.98 grams per mole, calculated by summing together the atomic weight of sodium and the atomic weight of fluorine. It has a density of 2.55 grams per cubic centimeter. Sodium fluoride is sometimes added to water at treatment facilities.