PROBLEM TO BE SOLVED: To provide a new ultraviolet absorber having high water solubility, and excellent absorptivity over a wide ultraviolet wave range, but no absorptivity in the visible range, and exhibiting high stability and safety.SOLUTION: The ultraviolet absorber comprises a benzilidene malonamide represented by formula (1) and its salt. The external preparation for the skin is obtained by formulating the ultraviolet absorber.COPYRIGHT: (C)2008,JPO&INPIT【課題】水溶性が高く、幅広い紫外線波長領域にわたって優れた吸収能を有し、可視領域には吸収がなく、しかも安定性、安全性の高い新規な紫外線吸収剤を提供すること。【解決手段】下記式(1)で表されるベンジリデンマロンアミド及びその塩、該新規化合物からなる紫外線吸収剤、この紫外線吸収剤を配合した皮膚外用剤である。【選択図】なし
