Release of benzimidazole and benzylidene camphor from topical sunscreen formulations.

Absorption of two ultraviolet (UV) filters was evaluated through a lipophilic synthetic membrane (Folioxane) and excised hairless rat skin using a flow-through diffusion cell. Folioxane membrane is an artificial skin used in the treatment of third-degree burns. Diffusion tests were performed with aqueous solutions and galenic formulations (one water-in-oil [W/O] emulsion and two oily gels).