硝酸钠+单氟磷酸钠

Potassium nitrate has a chemical formula of KNO3. It is an ionic salt of potassium ions K+ and nitrate ions NO3−, and is therefore an alkali metal nitrate. It is a natural source of nitrate and has been used as a constituent for several different purposes, including food preservatives, fertilizers, tree stump removal, rocket propellants and fireworks. Potassium nitrate is a common active ingredient in dentrifices where it exerts an antisensitivity action. It provides increasing protection against painful sensitivity of the teeth to cold, heat, acids, sweets or contact.
Sodium monofluorophosphate is used in OTC dental preparations to help protect against cavities