Sunscreen developed to have sun protection performance equivalent to Ecamsule (INCI: terephthalylidene dicamphor sulfonic acid) by modifying Ecamsule to form sodium for higher pH.
UVA Water-Soluble Chemical Sunscreen
Na-Ecamsule (eq. Mexoryl SX)
Bisdisulizole Disodium (UVA/Water-Soluble)
The only water-soluble sunscreen that can block UVA light (in the UVA-II range), can block UV waves in the 280-370nm range.