PROBLEM TO BE SOLVED: To provide a skin washing agent comprising a higher fatty acid salt which is creamy in foam quality, is excellent in low temperature storage stability, is suppressed in the precipitation in low temperature storage, has good discharging property when a foamer container is filled with the agent, is suppressed in moisture loss, and is mild aslo to a sensitive skin.SOLUTION: The skin washing agent comprises (A) a fatty acid salt represented by general formula (1): R1COOM [wherein R1 is a 5-21C univalent hydrocarbon and M is an alkali metal or a (substituted) ammonium], and the mass ratio represented by [fatty acid salt represented by general formula (1) wherein R1 is a &le11C univalent hydrocarbon]/[fatty acid salt represented by general formula (1) wherein R1 is a &ge13C univalent hydrocarbon] is 1.4-2.8, (B) an amphoteric surfactant, and (C) an N-acyl-N-methylamino acid salt.COPYRIGHT: (C)2008,JPO&INPIT【課題】高級脂肪酸塩が配合された皮膚洗浄料において、泡質がクリーミーで、低温保存安定性に優れ、低温保存時の析出が抑制されてフォーマー容器に充填した場合に吐出性が良好で、さらに水分蒸散量が抑制され、敏感な肌に対してもマイルドな皮膚洗浄料を提供する。【解決手段】(A)下記一般式(1)R1COOM (1)(式中、R1は炭素数5~21の一価炭化水素基を示し、Mはアルカリ金属、又は置換もしくは非置換のアンモニウムを示す。)で表される脂肪酸塩であって、(一般式(1)のR1が炭素数11以下の一価炭化水素基である脂肪酸塩)/(一般式(1)のR1が炭素数13以上の一価炭化水素基である脂肪酸塩)で表される質量比が1.4~2.8である脂肪酸塩と、(B)両性界面活性剤と、(C)N-アシル-N-メチルアミノ酸塩とを含有する皮膚洗浄料。【選択図】なし
