What it is
PEG-10 hydrogenated castor oil is made by reacting hydrogenated castor oil with ethylene oxide, producing a nonionic surfactant that helps blend oil and water phases. It is commonly used to solubilize oils, fragrances, and some UV filters and to stabilize emulsions, giving formulas a smooth, uniform texture. In sunscreens it supports an even, spreadable base and helps keep oil-soluble components dispersed.
Safety & warnings
Generally well tolerated as a mild nonionic surfactant. PEG-type emulsifiers are not typically allergens at cosmetic use levels, though very sensitive or compromised skin may occasionally react. It is not considered notably comedogenic at usual use levels.
Origin & sourcing
Synthetic derivative; produced by ethoxylating hydrogenated castor oil, which itself comes from the castor bean plant (Ricinus communis).
Questions everyone asks
What does PEG-10 hydrogenated castor oil do in a formula?
It acts as an emulsifier and solubilizer, helping oil and water mix and keeping oils, fragrances, or filters evenly dispersed.
Is it derived from castor oil?
Yes. It is made by chemically modifying hydrogenated castor oil with ethylene oxide to create a nonionic surfactant.