Peg-8 Stearate ●
TL;DR. This ingredient functions mainly as a nonionic emulsifier and solubilizer, helping oil and water phases stay blended in creams, lotions, and cleansers. It can also add mild cleansing and texture support.
What does Peg-8 Stearate do in a cosmetic formula?
This ingredient functions mainly as a nonionic emulsifier and solubilizer, helping oil and water phases stay blended in creams, lotions, and cleansers. It can also add mild cleansing and texture support.
Is Peg-8 Stearate clean?
From a clean-beauty perspective, it carries friction because it is made through ethoxylation, a process that requires tight control of residual ethylene oxide and 1,4-dioxane. It is generally low-irritation when well purified, but many stricter standards flag this material class.
Is Peg-8 Stearate sustainable?
This material typically combines a fatty component that may be plant, animal, or synthetic with a petrochemical-derived hydrophilic segment. It is expected to be at least partially biodegradable, but its fossil-derived processing route and residue-control needs weaken its sustainability profile.
Is Peg-8 Stearate COSMOS-approved?
This ingredient is not permitted under COSMOS-natural or COSMOS-organic standards because ethoxylated materials fall outside the allowed processing framework. Its Green Chemistry fit is limited by petrochemical input and purification requirements, even though part of the molecule may come from renewable fatty feedstocks.
How does Peg-8 Stearate work chemically?
The molecule is a nonionic ester with a C18 lipophilic chain and an average of about 8 oxyethylene units, giving it oil-in-water emulsifying and solubilizing behavior. It is often used around 0.5% to 5% in creams, lotions, and cleansing systems, and ester stability is best in the normal cosmetic pH range rather than strongly acidic or alkaline formulas.
Last updated 2026-05-13