Sodium Stearoyl Lacylate ●
TL;DR. This ingredient is primarily an anionic emulsifier and co-surfactant. It helps blend oil and water, stabilizes creams and lotions, and can add a soft, conditioned feel on skin or hair.
What does Sodium Stearoyl Lacylate do in a cosmetic formula?
This ingredient is primarily an anionic emulsifier and co-surfactant. It helps blend oil and water, stabilizes creams and lotions, and can add a soft, conditioned feel on skin or hair.
Is Sodium Stearoyl Lacylate clean?
It is generally well accepted in clean-beauty frameworks, especially when the fatty-acid feedstock is plant derived. Sensitization concern is low, though as an anionic emulsifier it can feel irritating at higher levels or in formulas made for very reactive skin.
Is Sodium Stearoyl Lacylate sustainable?
This material is commonly made from fatty acids, lactic acid, and sodium salts, with the fatty-acid source often coming from palm, coconut, rapeseed, or other vegetable oils. It is expected to be readily biodegradable, but palm-linked supply chains benefit from traceability and certification.
Is Sodium Stearoyl Lacylate COSMOS-approved?
It is generally compatible with COSMOS-natural and COSMOS-organic formulations when made from permitted natural-origin feedstocks and allowed processing routes such as esterification and neutralization. Its Green Chemistry profile is favorable because it can use renewable inputs, has good biodegradability, and does not rely on persistent silicone or fluorinated chemistry.
How does Sodium Stearoyl Lacylate work chemically?
The molecule is an anionic amphiphile built from a C18 fatty-acid chain linked to lactic acid units and neutralized as a sodium carboxylate, giving it both oil affinity and water dispersibility. Typical cosmetic use is often around 0.2% to 5%, with best performance in mildly acidic to neutral systems and with co-emulsifiers or fatty alcohols to improve emulsion stability.
Last updated 2026-05-14