Phenylbenzotriazole Sulfonic Acid
Compounds of phenylbenzotriazole sulfonic
acid origin are just recently introduced for cosK.
Skotarczak, A. Osmola-Man´kowska, M. Lodyga, A. Polan´ska, M. Mazur, Z. Adamski
metic purposes. Their action covers a wide spectrum
ranging from UVB to visible light, while simultaneously
being a very good absorbent of
UVA radiation. Registered substances of this
group include the following:
• Drometrizole trisiloxane (Mexoryl
® XL)
• Bisoctrizole (Tinosorb® M)
• Bemotrizinol (Tinosorb® S)
Drometrizole trisiloxane is a compound that is
well persisting on the skin suface, due to the
siloxane portion of the molecule. Concentrations
may not exceed 15% in cosmpetic products.
Bisoctrizole, or Tinosorb® M, is a pigment that
is water-soluble. Its fine particles remain on the
skin surface, but physicochemical properties do
not allow for penetration of the compound
through the skin. In cosmetics, presence may not
exceed a concentration more than 10%.
Tinosorb® S is a compound very similar to
Tinosorb® M, but is fat-soluble. The maximum
authorized concentration in cosmetic products is
also 10%.