1. A composition for oral care, which comprises the following components (A) and (B) :( A) of from 0.01 to 3% by weight phytic acid or its salt and (B) from 0.01 to 3% by weight pyrophosphoric acid or salt thereof, does not contain a polyvalent cation or a multivalent cation comprises a molar amount of less than 0.1 times the amount of phytic acid has a pH value from 5.5 to 6.5 upon dilution with water to 30% by weight, is the weight ratio (B / a) between the component (a) and component (B) from 0.2 to 3.0 and contains no fluoride compound has a content of hydrofluoric or of the compound is less than 500 ppm based on ftora.2 atoms. A composition for oral care implement of claim 1, wherein the content of the component (A) is from 0.02% to 2% by weight and the content of component (B) is from 0.02% to 2% by masse.3. A composition for oral care implement of claim 1, wherein the content of the component (A) is from 0.01% to 1.5% by weight, of component (B) is from 0.01% to 1.5% by weight and the total content of the component (A) and component (B) is from 0.02 to 2.5% by masse.4. A composition for oral care implement of claim 1, wherein the content of the pH regulator selected from organic acids and inorganic acids, but with the exception of phytic acid and pyrophosphoric acid, is 5% or less of phytic acid content in mass sootnoshenii.5. A composition for oral care implement of claim 1, further comprising component (C) erythritol, wherein the weight ratio (C / (A + B)) between the component (C) and the sum of components (A) and (B) is from 5 to 1000.6. A composition for oral care implement of claim 5, further comprising component (D) water in an amount of from 12 to 25% by weight, wherein the weight soot1. Композиция для ухода за полостью рта, которая содержит следующие компоненты (A) и (B):(A) от 0,01 до 3% по массе фитиновой кислоты или ее соли и(B) от 0,01 до 3% по массе пирофосфорной кислоты или ее соли, не содержит поливалентный катион или содержит поливалентный ка
