Stannous pyrophosphate

Stannous pyrophosphate (CAS 15578-26-4), also known as tin(II) diphosphate or tin(II) pyrophosphate, is an inorganic tin salt formed from stannous ions and pyrophosphate anions. It carries no assigned E-code and is classified under HS code 28353990. It is commercially available as a fine powder.

In oral care formulations, stannous pyrophosphate functions as an antioxidant by scavenging free radicals and inhibiting oxidative degradation of active ingredients, while its pyrophosphate component provides tartar-control activity through calcium phosphate crystal growth inhibition. In food and nutrition applications, it serves as a pH buffer, stabilising product acidity within defined processing parameters.

Stannous pyrophosphate is supplied in powder form and must comply with REACH registration requirements for European market use. Procurement teams should confirm grade specifications against relevant purity standards for their application, as food-contact and cosmetic uses each carry distinct regulatory obligations. Packaging formats vary by supplier volume requirements.