Octisalate is an ester that is created from condensation of salicylic acid and 2-ethylhexanol. It’s used as a sunscreen ingredient to provide broad spectrum protection and works by absorbing UV rays to prevent them from reaching deeper layers of the skin, where damage can occur.
The 2-ethylhexanol within octisalate maintains a fatty alcohol texture, helping to provide water resistance in sunscreen formulas and an emollient quality, locking moisture into the skin and preventing excess water loss.
Octisalate is one of several chemical UV filters that work together as a team to provide comprehensive protection from sun exposure. When used on its own, octisalate does not provide broad spectrum coverage, but when used in combination with photostabilizers and other chemical UV filters, skin is protected and the sunscreen’s capabilities are stabilized.