Butyl Stearate ●
TL;DR. This ingredient is primarily an emollient and skin-conditioning ester, used to add slip, reduce greasiness, and improve spreadability in creams, lotions, sticks, and color cosmetics. It can also help disperse pigments and soften wax-heavy formulas.
What does Butyl Stearate do in a cosmetic formula?
This ingredient is primarily an emollient and skin-conditioning ester, used to add slip, reduce greasiness, and improve spreadability in creams, lotions, sticks, and color cosmetics. It can also help disperse pigments and soften wax-heavy formulas.
Is Butyl Stearate clean?
From a clean beauty perspective, this ingredient is generally well tolerated and is not a major restricted-list concern. The main scrutiny is sourcing and manufacture, since it can be made from renewable or petrochemical feedstocks.
Is Butyl Stearate sustainable?
This material can be made from plant-derived fatty acids, animal-derived fatty acids, or petrochemical inputs, so its sustainability profile depends on supplier disclosure. It is an ester and is expected to biodegrade more readily than persistent silicone or fluorinated materials.
Is Butyl Stearate COSMOS-approved?
It can align with COSMOS-natural or COSMOS-organic only when the feedstocks and esterification process meet the standard’s natural-origin and processing rules. From a Green Chemistry view, it fits better when made from renewable fatty acids and low-residue processing, but conventional petrochemical sourcing makes the profile less clear.
How does Butyl Stearate work chemically?
The molecule is a fatty ester built from a short-chain alcohol and a saturated C18 fatty acid, giving it a nonpolar, oily character with good lubricity. It is typically stable across normal cosmetic pH ranges, but like other esters it can hydrolyze under strongly acidic or alkaline conditions, and it is less oxidation-prone than esters based on highly unsaturated fatty acids.
Last updated 2026-05-13