PEG-8 Distearate ●
TL;DR. This ingredient is primarily a nonionic emulsifier and texture builder, helping oil and water phases stay dispersed while adding body to creams, lotions, and cleansing formulas.
What does PEG-8 Distearate do in a cosmetic formula?
This ingredient is primarily a nonionic emulsifier and texture builder, helping oil and water phases stay dispersed while adding body to creams, lotions, and cleansing formulas.
Is PEG-8 Distearate clean?
From a clean-beauty perspective, this ingredient has friction because it is made through ethoxylation, a process that requires tight purification controls for residual ethylene oxide and 1,4-dioxane. It is generally considered low in direct irritation potential, but many stricter standards flag the processing route rather than the finished material itself.
Is PEG-8 Distearate sustainable?
This material combines a petroleum-derived polyether portion with fatty acid chains that may come from plant, animal, or petrochemical sources. Biodegradability is less straightforward than for simple fatty acid esters, and sourcing transparency matters when the fatty acid portion is palm-derived.
Is PEG-8 Distearate COSMOS-approved?
It is not permitted under COSMOS-natural or COSMOS-organic because ethoxylated materials are excluded. Its Green Chemistry fit is limited by petrochemical feedstocks and ethoxylation, even though it can support efficient emulsification at relatively low use levels.
How does PEG-8 Distearate work chemically?
The molecule is a diester built from an average 8-unit oxyethylene chain capped with two long saturated fatty acid groups, giving it both water-compatible and oil-compatible regions. It is typically used around 0.5 to 5% and is most stable in mildly acidic to neutral systems, while strong acid or alkaline conditions can gradually hydrolyze the ester bonds.
Last updated 2026-05-13