Ethylhexyl Triazone is a highly effective UV-B filter with an exceptionally high absorptivity of over 1,500 at 314 nm. Because of its high A1/1 value, only small concentrations are required in cosmetic suncare preparations, to achieve a high SPF value. Concentrations up to 3% are recommended. Besides the polar nature of this product gives it good affinity to the keratin in the skin, so that formulations in which it is used are particularly water-resistant.