PROBLEM TO BE SOLVED: To provide a silica-containing composition for oral cavity which has improved bactericidal activity of hinokitiol and gives a moderate brushing feeling and is excellent in bactericidal effect of pathogenic bacteria in oral cavity, and to provide a method for improving bactericidal activity of hinokitiol in the composition for oral cavity.SOLUTION: The present invention relates to the composition for oral cavity, in which (C) 0.1 to 2 mass% of ascorbic acid phosphate or a salt thereof is formulated with the composition for oral cavity comprising (A) 5 to 40 mass% of silica and (B) 0.005 to 0.2 mass% of hinokitiol composition, and a method for improving bactericidal activity of hinokitiol in the composition for oral cavity in which the component (C) is formulated with the composition for oral cavity comprising the component (A) and the component (B).SELECTED DRAWING: NoneCOPYRIGHT: (C)2017,JPO&INPIT【課題】ヒノキチオールの殺菌力が向上し、適度な刷掃実感を与えると共に口腔内病原性細菌の殺菌効果が優れる、シリカ含有の口腔用組成物、及び口腔用組成物におけるヒノキチオールの殺菌力向上方法を提供する。【解決手段】(A)シリカ5~40質量%と(B)ヒノキチオール0.005~0.2質量%とを配合してなる口腔用組成物に(C)アスコルビン酸リン酸エステル又はその塩を0.1~2質量%配合した口腔用組成物、及び前記(A)、(B)成分を配合してなる口腔用組成物に(C)成分を配合する、口腔用組成物におけるヒノキチオールの殺菌力向上方法。【選択図】なし
