La
Lauryl PEG-9 Polydimethylsiloxyethyl Dimethicone
Lauryl PEG-9 Polydimethylsiloxyethyl Dimethicone
A silicone emulsifier for creams whose outer part is oil or silicone.
What it does
It’s a silicone with a fatty part and a PEG part built in, so it holds both oil and water. That lets it keep water droplets spread through an oil or silicone base.
The evidence, graded
expert consensusUS safety reviewers (2015) assessed 111 silicones joined to PEG or PPG chains, used to condition hair, thicken, steady mixtures and form films. These large molecules aren’t expected to pass into skin. A brow pencil with 15% cetyl PEG/PPG-10/1 dimethicone didn’t irritate or cause allergy in people. They judged all 111 safe as used, bis-hydroxyethoxypropyl dimethicone and lauryl PEG-9 polydimethylsiloxyethyl dimethicone among them.Becker 2015 · Cosmetic Ingredient Review ↗
Graded per the methodology: strong · moderate · emerging · expert consensus. A weak source on a strong claim gets the weaker label.
Browse all 809 ingredients — grouped by what they do, each with whatever evidence we can cite.
This page is public so a shared ingredient card always has its sources behind it — and so you can check them without an account.
Want more like this?
Every evidence-based flag cites its source, Drop tells you when your routine is complete, and it helps you simplify — instead of selling you more. The app launches on iOS and Android in October 2026. Rate my routine works today at /rate — no sign-in.