PROBLEM TO BE SOLVED: To provide a liquid composition containing tranexamic acid or ε-aminocapronic acid for an oral cavity in which the discoloration of a formulation with the lapse of time is suppressed, and which has excellent appearance stability, and has high acceptability, and to provide a method for suppressing discoloration in the liquid composition for an oral cavity.SOLUTION: The liquid composition for an oral cavity is obtained by blending a liquid composition for an oral cavity blended with (A) tranexamic acid or ε-aminocapronic acid and (B) cinnamic aldehyde of 0.0002 to 0.002 mass% with (C) sodium alkylsulfate of 0.05 to 0.2 mass%. The method for suppressing discoloration in the liquid composition for an oral cavity is characterized in that a liquid composition for an oral cavity obtained by being blended with the component (A) and the component (B) of 0.0002 to 0.002 mass% with the component (C) of 0.05 to 0.2 mass%.COPYRIGHT: (C)2013,JPO&INPIT【課題】経時での製剤の変色が抑制され優れた外観安定性を有する、嗜好性の高いトラネキサム酸又はε-アミノカプロン酸含有液体口腔用組成物及び前記液体口腔用組成物における変色抑制方法を提供する。【解決手段】(A)トラネキサム酸又はε-アミノカプロン酸と、(B)シンナミックアルデヒドを0.0002~0.002質量%とを配合した液体口腔用組成物に、(C)アルキル硫酸ナトリウムを0.05~0.2質量%配合してなることを特徴とする液体口腔用組成物、及び上記成分(A)と、成分(B)を0.0002~0.002質量%とを配合した液体口腔用組成物に、成分(C)を0.05~0.2質量%配合することを特徴とする、前記液体口腔用組成物における変色抑制方法。【選択図】なし
