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Their action covers a wide spectrumranging from UVB to visible light, while simultaneouslybeing a very good absorbent ofUVA radiation. Registered substances of thisgroup include the following:• Drometrizole trisiloxane (Mexoryl® XL)• Bisoctrizole (Tinosorb® M)• Bemotrizinol (Tinosorb® S)Drometrizole trisiloxane is a compound that iswell persisting on the skin suface, due to thesiloxane portion of the molecule. Concentrationsmay not exceed 15% in cosmpetic products.Bisoctrizole, or Tinosorb® M, is a pigment thatis water-soluble. Its fine particles remain on theskin surface, but physicochemical properties donot allow for penetration of the compoundthrough the skin. In cosmetics, presence may notexceed a concentration more than 10%.Tinosorb® S is a compound very si
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