Polysorbate 21 ●
TL;DR. This ingredient is a nonionic surfactant and emulsifier used to help disperse oils, fragrance components, and other lipophilic materials into water-based formulas. It can also improve wetting and mild cleansing performance in rinse-off products.
What does Polysorbate 21 do in a cosmetic formula?
This ingredient is a nonionic surfactant and emulsifier used to help disperse oils, fragrance components, and other lipophilic materials into water-based formulas. It can also improve wetting and mild cleansing performance in rinse-off products.
Is Polysorbate 21 clean?
From a clean-beauty perspective, it is usually flagged because it is ethoxylated and may require tight control for residual ethylene oxide and 1,4-dioxane. Skin tolerance is generally good at typical cosmetic use levels, but the processing route creates more scrutiny than the molecule’s day-to-day irritation profile.
Is Polysorbate 21 sustainable?
This material is typically made from a fatty acid, sugar-alcohol chemistry, and petrochemical-derived ethoxylation inputs. It is generally considered biodegradable, but its fossil-derived processing step and residue-management burden weaken its sustainability profile.
Is Polysorbate 21 COSMOS-approved?
It is not aligned with COSMOS-natural or COSMOS-organic standards because ethoxylation is not an accepted processing route. From a Green Chemistry view, it has useful functionality and partial biobased content, but petrochemical input, extra processing, and impurity controls are clear drawbacks.
How does Polysorbate 21 work chemically?
The molecule is an ethoxylated sorbitan fatty-acid ester with amphiphilic structure, giving it oil-water interfacial activity and solubilizing behavior. It is typically used at low single-digit percentages, is broadly compatible across common cosmetic pH ranges, and can be sensitive to strong oxidizers or extreme pH over time.
Last updated 2026-05-13