US Patent No. 10,080,711 B2; Procter & Gamble Company,
has patented a mouthwash that contains pyrophosphate in an orally acceptable carrier that is comprised of less than 11% alcohol, wherein the pyrophosphate is provided by a mixture consisting of disodium pyrophosphate and tetrasodium pyrophosphate in a ratio from disodium pyrophosphate to tetrasodium pyrophosphate in the range of from 1:0.4 to 1:1.2. The pH value of the composition is in the range of from 6.0 to 8.0. The composition comprises less than 13 mM potassium ions, and wherein the maximum level of sodium in the composition is less than 300 mM.