| abstract |
PROBLEM TO BE SOLVED: To provide an external preparation for skin which can obtain a sufficient viscosity by a simple operation in a salt type drug combination system, and is excellent in stability with time and feeling of use. An external preparation for skin comprising a salt-type drug, xanthan gum, and guar gum. The weight ratio of xanthan gum to guar gum is preferably 10:90 to 90:10, more preferably 20:80 to 80:20, and in particular 50:50 to 20:80, the viscosity stability at high temperature is excellent. . In addition, it is preferable that the salt-type drug is an ascorbic acid-based and / or alkoxysalicylic acid-based whitening agent. [Selection figure] None |