What it is
This is the ester of heptyl alcohol and undecylenic acid, giving a light, dry, fast-spreading emollient. It is often used as a plant-derived alternative to silicones or heavier oils to deliver a smooth, non-greasy slip in lotions and sunscreens. It also helps solubilize and spread other oil-phase ingredients.
Safety & warnings
Generally well tolerated, with a light feel and low expected irritation potential in normal cosmetic use.
Origin & sourcing
Synthetic ester, commonly derived from plant-sourced raw materials such as castor-derived undecylenic acid.
Questions everyone asks
What does heptyl undecylenate feel like?
It gives a light, dry, fast-spreading slip and is often used as a non-greasy alternative to heavier oils or silicones.
Is it natural or synthetic?
It is a synthetic ester, though it is commonly made from plant-derived starting materials.