PROBLEM TO BE SOLVED: To provide a liquid oral composition which can improve the sustainability of teeth whitening effect and can fully exhibit the coloring inhibitory effect of teeth, using a phytic acid.SOLUTION: The liquid oral composition comprises the following component (A)-(B): (A) 0.01 mass% or more to 1.5 mass% or less of phytic acid or a salt thereof in terms of the acid, (B) 0.01 mass% or more to 1 mass% or less of hydroxyalkyl cellulose, and (C) 70 mass% or more to 95 mass% or less of water, and the mass ratio (A/B) of component (A) in terms of the acid to the mass of component (B) is 0.1 or more to 7 or less, and the composition does not contain any polyvalent metal cation, or alternatively contains such cations in a molar amount of less than 0.1 times that of component (A), and exhibits a pH of 5.5 or more to 6.5 or less, and the viscosity of the composition is 30 mPa-s or less at 25°C.COPYRIGHT: (C)2014,JPO&INPIT【課題】フィチン酸を用いつつ、歯の美白効果の持続性を高めて歯の着色抑制効果を十分に発揮することができる液体口腔用組成物に関する。【解決手段】次の成分(A)~(B):(A)フィチン酸又はその塩 酸換算量で0.01質量%以上1.5質量%以下(B)ヒドロキシアルキルセルロース 0.01質量%以上1質量%以下、及び(C)水 70質量%以上95質量%以下含有し、成分(A)の酸換算量と成分(B)との質量比(A/B)が0.1以上7以下であり、かつ多価金属カチオンを含有しないか又は成分(A)に対して0.1倍モル未満含有し、pHが5.5以上6.5以下であって、25℃における粘度が30mPa・s以下である液体口腔用組成物。【選択図】なし
