PROBLEM TO BE SOLVED: To provide a hinokitiol-containing composition for oral cavity, which is excellent in stability of hinokitiol in a preparation, exerts high antibacterial activity and suppresses discoloration or phase separation during long-term storage and is thus excellent in shelf stability.SOLUTION: The composition for oral cavity comprises: (a) hinokitiol (b) at least one edetate chosen from disodium edetate, trisodium edetate, dipotassium edetate dihydrate and tetrasodium edetate dihydrate (c) ethanol and (d) water, provided that the contents of component (b) and component (c) are 0.02-1 mass% and 0.2-10 mass%, respectively, and the mass ratio of (d)/(c) is 3-200.COPYRIGHT: (C)2010,JPO&INPIT【解決手段】(a)ヒノキチオール、(b)エデト酸二ナトリウム、エデト酸三ナトリウム、エデト酸二カリウム二水塩、エデト酸四ナトリウム二水塩から選ばれる少なくとも1種のエデト酸塩、(c)エタノール、(d)水を含有し、(b)成分の含有量が0.02~1質量%、(c)成分の含有量が0.2~10質量%、かつ(d)/(c)が質量比で3~200であることを特徴とする口腔用組成物。【効果】本発明の口腔用組成物は、ヒノキチオールの安定性に優れ、優れた抗菌活性が発揮され、かつ長期保存しても経時で変色や相液分離が生じることがほとんどなく、保存安定性に優れる。【選択図】なし
