Sodium fluoride Formula – Sodium Fluoride Properties, Structure, and Formula
Fluoride sodium is an inorganic salt that is important for many applications.
Structure and formula: The chemical formula for sodium fluoride (NaF) is 41.99 g/mol. It is a simple, ionic compound made from the sodium (Na+), cation, and fluoride(F-) anion. It is made up of cubic crystals that are similar to those found in sodium chloride (NaCl) crystals.
Occurrence of sodium fluoride in nature: Very small amounts of sodium fluoride are found in nature, as the rare mineral villiaumite.
Preparation: The main source of sodium fluoride is industrial production. It is often prepared by neutralizing hydrofluoric acids with bases like sodium carbonate (soda-ash, Na2CO3) or sodium hydroxide [caustic soda (NaOH), or sodium bicarbonate) (NaHCO3).
HF + NaOH + NaF + H2O
Physical properties: Sodium fluoride can be described as an odorless, crystal solid, which is white-to-greenish in color depending on its purity. It has a density of 2.56g/mL, a melting point of 993 degrees C, and a boiling point at 1,704 degrees Celsius. It is a hygroscopic (absorbs water from the air) solid.
Chemical properties: Sodium Fluoride is highly soluble in water and easily dissociates into sodium and fluoride. It is not combustible and is corrosive to aluminum. It is stable in normal conditions. However, when heated to high temperatures it releases toxic and corrosive fumes (HF) of hydrogen fluoride.
Uses: Sodium fluoride can be used in toothpastes and water supplies to maintain good dental health. It can also be used in the metallurgy, glass, and as a preservative, corrosion inhibitor and cleaning agent. Nuclear medical imaging is another important use of radioactive sodium fluoride (NaF18), which is used to detect various conditions.
Health effects/hazards: Sodium fluoride can cause severe health problems and even death. It can cause vomiting, nausea, convulsions and death if swallowed. Inhalation can cause serious irritation to the respiratory tract. Contact with solid NaF on the skin or eyes can cause severe irritation, burns or even death.Tags: Sodium fluoride