Ecamsule
Ecamsule (USAN, trade name Mexoryl SX, INCI terephthalylidene dicamphor sulfonic acid) is an organic compound which is added to many sunscreens to filter out UVA rays. It is a benzylidene camphor derivative, many of which are known for their excellent photostability. Although there are a few different UV absorbers with the trade name Mexoryl, only two of them are widely used where approved. Mexoryl SX (water-soluble) and Mexoryl XL (INCI Drometrizole trisiloxane, oil-soluble). Together they show a synergistic effect in protection. The patents are held by L'Oréal. Sunscreens containing ecamsule are exclusive to L'Oréal and its brands. Mode of action Exposed to UV, ecamsule undergoes reversible photoisomerization, followed by photoexcitation. The absorbed UV is then released as thermal energy, without penetrating the skin. UVB rays cause short-term sunburn and skin cancer; UVA rays cause wrinkling and may have some role in development of skin cancer. There is no official rat ...
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