PROBLEM TO BE SOLVED: To provide a composition for oral cavity which comprises hinokitiol and has excellent appearance stability even after a lapse of time and to provide a method for suppressing color change of a preparation and liquid separation in the composition for oral cavity.SOLUTION: There are provided: a composition for oral cavity which comprises (A) hinokitiol, (B) an ascorbic acid phosphate ester and/or a salt thereof and (C) fluorine ions, where the content of the component (C) is 0.0001 to 0.27 mass% and the mass ratio: ((A)+(B))/(C) showing the blending ratio of the components (A) and (B) to the component (C) is 0.5 to 11000 and a method for suppressing color change of a preparation and liquid separation caused by the components (A) and (B) in the composition for oral cavity in which the component(C) is blended in a composition for oral cavity obtained by blending the components (A) and (B) in the specified quantity range and at a ratio where ((A)+(B))/(C) is within the specific range.SELECTED DRAWING: NoneCOPYRIGHT: (C)2018,JPO&INPIT【課題】ヒノキチオールを含有し、外観安定性が経時でも優れる口腔用組成物及び前記口腔用組成物における製剤変色及び液分離の抑制方法を提供する。【解決手段】(A)ヒノキチオール、(B)アスコルビン酸リン酸エステル又はその塩、(C)フッ素イオンを含有し、(C)成分の含有量が0.0001~0.27質量%であり、かつ(C)成分に対する(A)及び(B)成分の配合割合を示す((A)+(B))/(C)が質量比として0.5~11,000である口腔用組成物、及び前記の(A)及び(B)成分を配合した口腔用組成物に(C)成分を前記特定量範囲、かつ((A)+(B))/(C)が前記特定範囲内で配合する、前記口腔用組成物における(A)及び(B)成分による製剤変色及び液分離の抑制方法。【選択図】なし
