Ensulizole                                                  It is a water-soluble sun filter that offers protection against UV-B and short range UV-A radiation.(CAS 27503-81-7)It is ideal for use in a number of cosmetic applications, including sunscreens, baby sun care, daily skin care, broad spectrum UV-B filter, and decorative cosmetics with sun protection. The free acid is poorly soluble in water, so it is only used as it's soluble salts.