The present invention relates to a single phase oral care composition comprising: a. a stannous salt b. a potassium salt c. a chelant d. monofluorophosphate (MFP). The composition of the invention has been found to allow prolonged contact between stannous ion and nitrate ion in a single dentifrice without toxic effects or insoluble products. The invention further provides for the maintenance of an efficacious fluoride ion level.