Stearoyl Lactylate ●
TL;DR. This ingredient functions mainly as an anionic oil-in-water emulsifier and emulsion stabilizer. It helps disperse oils, supports lamellar structure, and can improve cushion and skin feel in creams, lotions, and cleansers.
What does Stearoyl Lactylate do in a cosmetic formula?
This ingredient functions mainly as an anionic oil-in-water emulsifier and emulsion stabilizer. It helps disperse oils, supports lamellar structure, and can improve cushion and skin feel in creams, lotions, and cleansers.
Is Stearoyl Lactylate clean?
From a clean-beauty perspective, this ingredient is generally well tolerated and is not a common restricted-list focus. Sensitivity is uncommon, though any surfactant-type emulsifier can contribute to stinging in very reactive skin or compromised-barrier formulas.
Is Stearoyl Lactylate sustainable?
This material is usually made from long-chain fatty acids plus a fermentation-derived acid, with the main sourcing question being whether the fatty fraction traces to palm or another crop with land-use concerns. Its ester structure supports biodegradation and it is not known for environmental persistence.
Is Stearoyl Lactylate COSMOS-approved?
It is permitted under COSMOS-natural and COSMOS-organic when made from approved natural-origin feedstocks using allowed esterification chemistry, so supplier documentation matters. Its Green Chemistry fit is solid, since renewable inputs are common, ester bonds support biodegradation, and it does not rely on persistent silicone or fluorinated chemistry.
How does Stearoyl Lactylate work chemically?
The molecule is an amphiphilic ester with a C18 fatty tail and a small alpha-hydroxy-acid-derived polar head, giving it both oil affinity and water-interface activity. Typical use is often around 0.5% to 5% as an emulsifier or co-emulsifier, with best stability in mildly acidic to neutral systems and reduced compatibility with strongly cationic systems.
Last updated 2026-05-13