PEROXYDONE K-30 complex by Ashland Specialty Chemical acts as a whitening agent. It is a highly stable, solid complex of hydrogen peroxide with pharmaceutical-grade polyvinylpyrrolidone. It is stable in a wide range of solvents and provide excellent substantivity, bioadhesion, film-forming and formulation thickening. It releases hydrogen peroxide on contact with water or saliva, resulting in brighter and whiter teeth.