| 摘要 |
A sunscreen composition suitable for topical application to human skin or hair, to provide protection from excessive exposure to ultra-violet rays, comprises: i) an effective amount of a substituted 1,3-diketone having an ultra-violet absorption band within the range of from 250 to 500 nm, and an extinction coefficient epsilon of from 5,000 to 70,000; and ii) a physiologically acceptable vehicle for the substituted 1,3-diketone. c |
