| 摘要 |
A cosmetic comprising the following components (A), (B), (C) and (D):
(A) 0.001 to 50 % by weight of an organic acid represented by a general formula (1), wherein R 1 denotes a residue derived from a natural sterin having one hydroxy group or a hydrogenated product thereof, or a residue derived from bile acid in which the hydroxyl hydrogen atom is removed; R 2 denotes a divalent hydrocarbon group having 1 to 24 carbon atoms; and M denotes a hydrogen atom, an alkali metal, an alkaline earth metal, ammonium, alkanolammonium having 2 to 9 carbon atoms in total, alkylammonium or alkenylammonium having 1 to 22 carbon atoms in total, a pyridinium substituted with an alkyl group or an alkenyl group having 1 to 18 carbon atoms, or a basic amino acid;
(B) 0.001 to 20% by weight of a base;
(C) 0.0001 to 50% by weight of a ceramide; and
(D) water,
and comprising, as a component (E), an acid other than the component (A) in a content satisfying a relationship: 0 ‰¤ (E)/(A) < 0.2, and having pH of 6 to 11. |
