Dihydroeuparin as sunscreen.

Physicochemical parameters, epsilon, lambda, solubility in water and Brij-3 5, pKa, K-a and photostability for dihydroeuparin, 5-acetyl-2, 3-dihydro-6- hydroxi-2-isopropenyl-benzo (b) furan (from Senecio Graveolens), were obtai ned and compared to those of o-hidroxyacetophenone. Its sunscreen capabilit ies, SPF and SSPF, were obtained for both compounds and compared to those o f homomenthylsalicylate (homosalate). Results indicate that dihydroeuparin has sunscreen behavior at 270-340 nm zone, with high photostability, high s olubility in miscellar system, apparently is a non-toxic substance and show s higher sunscreen capabilities than homosalate.