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Heptyl Undecylenate
Heptyl UndecylenateBarrier
A castor-derived ester that softens skin with a light, silicone-like feel.
What it does
Heptyl undecylenate is an ester made from castor oil. It spreads easily and leaves a light, dry finish, so formulas use it as a plant-based alternative to silicones. Drop has read no study of it on skin; it is listed for the job it does in the formula.
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