Stearic Acid ●
TL;DR. This ingredient is a fatty structurant and co-emulsifier that thickens creams, adds body to sticks and balms, and helps harden cleansing bars. It can also contribute opacity and a richer skin feel.
What does Stearic Acid do in a cosmetic formula?
This ingredient is a fatty structurant and co-emulsifier that thickens creams, adds body to sticks and balms, and helps harden cleansing bars. It can also contribute opacity and a richer skin feel.
Is Stearic Acid clean?
Clean-beauty standards generally treat this ingredient as well-tolerated and low concern, with little allergen or irritation history in typical leave-on use. The main scrutiny is sourcing transparency, especially when the feedstock is palm-derived.
Is Stearic Acid sustainable?
This material is commonly made from plant oils, animal fats, or blended fatty feedstocks, and plant-derived grades are widely available. It is readily biodegradable, but palm-linked supply chains benefit from certification and traceability.
Is Stearic Acid COSMOS-approved?
It is permitted under COSMOS-natural and can fit COSMOS-organic formulas when the feedstock and processing route meet the standard. From a Green Chemistry view, it aligns well when made from renewable oils through simple fat-splitting or hydrogenation steps and does not raise persistence concerns.
How does Stearic Acid work chemically?
The molecule is a long-chain saturated C18 carboxylic acid with a melting point around 69 to 70 °C, which explains its waxy structure-building effect. Typical use is about 1 to 5% in creams and higher in sticks or cleansing bars, and it is oxidation-stable compared with unsaturated fatty materials.
Last updated 2026-05-15