| 摘要 |
PROBLEM TO BE SOLVED: To provide a skin care preparation containing urea by which chemical stability of urea is remarkably improved and having a long service life. SOLUTION: This skin care preparation comprises (a) urea, (b) tartaric acid and/or malic acid and (c) triethanolamine or 2-amino-2-hydroxymethyl-1,3- propanediol, and pH of the system is adjusted to 6-8.
|
