Oleth-20 ●
TL;DR. This ingredient is a nonionic surfactant and solubilizer, used to disperse oils, fragrance components, and other lipophilic materials into water-based formulas. It can also support emulsification and mild cleansing systems.
What does Oleth-20 do in a cosmetic formula?
This ingredient is a nonionic surfactant and solubilizer, used to disperse oils, fragrance components, and other lipophilic materials into water-based formulas. It can also support emulsification and mild cleansing systems.
Is Oleth-20 clean?
From a clean-beauty perspective, it is often flagged because it is made through ethoxylation, which can leave trace 1,4-dioxane if purification is not well controlled. It is generally functional and low-odor, but many restricted lists treat this chemistry as compromised rather than preferred.
Is Oleth-20 sustainable?
This material typically combines a fatty alcohol feedstock with petroleum-derived ethylene oxide, so its sourcing profile is mixed. It is expected to be biodegradable as part of the broader fatty alcohol ethoxylate family, but the petrochemical input and processing route weaken its sustainability profile.
Is Oleth-20 COSMOS-approved?
It is not permitted in COSMOS natural or organic products because the ethoxylation route sits outside the standard’s allowed chemistry. From a Green Chemistry view, its useful performance is offset by non-renewable feedstock reliance and the need to manage residual processing impurities.
How does Oleth-20 work chemically?
The molecule is a nonionic ether made by adding about 20 oxyethylene units to an 18-carbon unsaturated fatty alcohol, giving it strong water compatibility and oil-solubilizing behavior. It is commonly used at low single-digit levels in rinse-off and leave-on systems, is broadly pH-stable, and may need antioxidant support when paired with oxidation-prone oils.
Last updated 2026-05-13