Tin(II) fluoride

Tin(II) fluoride, also known as stannous fluoride, is a chemical compound. Its chemical formula is SnF2. It contains tin and fluoride ions. The tin is in its +2 oxidation state.

Properties
Tin(II) fluoride is a colorless crystalline solid. It dissolves in water. It is a reducing agent. It can be oxidized to solid tin(IV) fluoride, which does not work for dentistry.

Preparation
It is made by reacting tin or its oxide with hydrofluoric acid. 

Uses
It is commonly used in toothpastes as a source of fluoride ions. The fluoride ions react with the enamel of the tooth, making it harder to attack by bacteria. It also stops gingivitis. Some mouthwashes have tin(II) fluoride in them. 

Related pages
Tin(II) chloride
Tin(IV) chloride

Category:Tin compounds
Category:Fluorine compounds