Peg-9 Dimethicone ●
TL;DR. This ingredient is a water-in-oil emulsifier and slip-enhancing conditioning agent, often used to stabilize long-wear makeup, sunscreens, primers, and low-tack skin-care textures.
What does Peg-9 Dimethicone do in a cosmetic formula?
This ingredient is a water-in-oil emulsifier and slip-enhancing conditioning agent, often used to stabilize long-wear makeup, sunscreens, primers, and low-tack skin-care textures.
Is Peg-9 Dimethicone clean?
From a clean-beauty perspective, it faces friction because it is a synthetic ethoxylated polymer with possible residual ethylene oxide and 1,4-dioxane if purification is not well controlled. It is typically low-irritation on skin, but many stricter clean standards do not favor this material class.
Is Peg-9 Dimethicone sustainable?
This material is synthetic and generally relies on petrochemical and mineral-derived inputs. Its larger polymeric structure is not readily biodegradable, so environmental persistence is the main sustainability concern.
Is Peg-9 Dimethicone COSMOS-approved?
It is not permitted under COSMOS-natural or COSMOS-organic standards. Its synthetic origin, ethoxylated segments, and limited biodegradability make it a weak fit with Green Chemistry preferences for renewable feedstocks, simpler degradation, and lower-concern processing chemistry.
How does Peg-9 Dimethicone work chemically?
The molecule is an amphiphilic polymer with a flexible inorganic-organic backbone and hydrophilic polyether side chains, which lets it sit at oil-water interfaces and stabilize dispersed water droplets. It is generally stable across typical cosmetic pH ranges and is most often paired with oils, waxes, powders, and film-formers to improve spread, cushion, and emulsion stability.
Last updated 2026-05-15