What it is
Pentaerythrityl tetraethylhexanoate is an ester formed from pentaerythritol and 2-ethylhexanoic acid, giving an oily liquid with good spreadability and oxidative stability. In sunscreens it serves as an emollient that delivers a smooth, light feel and can help solubilize and carry oil-soluble UV filters. Its stable, low-tack character makes it a common base ingredient in modern sun care.
Safety & warnings
This ester is well tolerated and is regarded as low-irritation and low-sensitizing in cosmetic use. It is widely used in sunscreens without notable comedogenicity concerns at typical levels.
Origin & sourcing
Synthetic. It is manufactured by esterifying pentaerythritol with 2-ethylhexanoic acid.
Questions everyone asks
What does pentaerythrityl tetraethylhexanoate do in sunscreen?
It acts as a light emollient and solvent that gives a smooth feel and helps dissolve and carry oil-soluble UV filters.
Is it natural or synthetic?
It is a synthetic ester made from pentaerythritol and 2-ethylhexanoic acid.