PROBLEM TO BE SOLVED: To provide a liquid oral composition which improves the stability of an ascorbic acid phosphate ester in a liquid oral composition comprising an ascorbic acid phosphate ester, simultaneously inhibits the reduction of a persistence rate thereof and the formation of sediment thereof with time, and has a good use feeling instead of an uncomfortable feeling and a method for stabilizing an ascorbic acid phosphate ester or a salt thereof in the liquid oral composition.SOLUTION: The liquid oral composition is obtained by incorporating (B) an organic acid or a salt thereof and (C) an orthophosphate salt into a liquid oral composition containing (A) an ascorbic acid phosphate ester or a salt thereof and not containing an abrasive, and has a pH of 6.5-8.0 and a water content of 60 mass% or more. The method for stabilizing the ascorbic acid phosphate ester or the salt thereof in the liquid oral composition comprises incorporating the component (B) and the component (C) into the liquid oral composition containing the component (A) and not containing an abrasive and setting the pH at 6.5-8.0 and the water content at 60 mass% or more.COPYRIGHT: (C)2012,JPO&INPIT【課題】アスコルビン酸リン酸エステル類を配合した液体口腔用組成物において、アスコルビン酸リン酸エステル類の安定性を改善し、その経時での残存率低下とオリ発生とが同時に抑制され、かつ違和感がなく使用感の良好な液体口腔用組成物及び液体口腔用組成物におけるアスコルビン酸リン酸エステル又はその塩の安定化方法を提供する。【解決手段】(A)アスコルビン酸リン酸エステル又はその塩を含有し、研磨剤を含まない液体口腔用組成物に、(B)有機酸又はその塩と(C)オルトリン酸塩とを配合し、pHを6.5~8.0とし、水分量を60質量%以上とする液体口腔用組成物。上記(A)成分を含有し、研磨剤を含まない液体口腔用組成物に、(B)成分と(C)成分とを配合し、pHを6.5~8.0とし、水分量を60質量%以上とする、前記液体口腔用組成物におけるアスコルビン酸リン酸エステル又はその塩の安定化方法。【選択図】なし
