PROBLEM TO BE SOLVED: To provide a liquid composition for oral cavity, which is high in permeability of a germicidal ingredient to a periodontal disease primitive biofilm, exhibits high germicidal effects to the periodontal disease primitive biofilm, suppresses allantoin hydrolysis in high temperature preservation, is excellent in gum-tightening effect in use of products immediately after preparation or products preserved at a high temperature, has no improper taste but good taste in and after use, and has good appearance stability after high temperature or low temperature preservation.SOLUTION: The liquid composition for oral cavity includes (A) isopropylmethylphenol, (B) allantoin, (C) polyoxyethylene-cured castor oil having 40-100 mol average addition mole number of ethylene oxide, and (D) a combination of citric acid with citrate or an alkaline chemical other than the citrate, or a citrate and citric acid or an acid other than the citric acid, wherein the blending quantity of the ingredient (C) is 0.10-1.0 mass% the mass ratio of (C)/(B) is 5-30 and pH is 4.0-6.2.COPYRIGHT: (C)2010,JPO&INPIT【解決手段】(A)イソプロピルメチルフェノール、(B)アラントイン、(C)エチレンオキサイドの平均付加モル数が40~100モルのポリオキシエチレン硬化ヒマシ油、(D)クエン酸とクエン酸塩もしくはクエン酸塩以外のアルカリ剤、又はクエン酸塩とクエン酸もしくはクエン酸以外の酸とを組合せたものを含有し、成分(C)の配合量が0.10~1.0質量%で、かつ(C)/(B)の質量比が5~30、pHが4.0~6.2である液体口腔用組成物。【効果】本発明の液体口腔用組成物は、殺菌成分の歯周病原性バイオフィルムへの浸透性が高く、アラントイン加水分解抑制効果に優れ、優れた歯グキ引締め効果を発揮し、異味がなく、使用感に優れ、外観安定性が良好である。【選択図】なし
