SodiumLauroyl Methyl Isethionate ●
TL;DR. This ingredient is a mild anionic surfactant used to create foam, lift oil and soil, and support a creamy rinse feel in cleansers. It often serves as the primary cleansing agent or a co-surfactant in sulfate-free face washes, body washes, shampoos, and syndet bars.
What does SodiumLauroyl Methyl Isethionate do in a cosmetic formula?
This ingredient is a mild anionic surfactant used to create foam, lift oil and soil, and support a creamy rinse feel in cleansers. It often serves as the primary cleansing agent or a co-surfactant in sulfate-free face washes, body washes, shampoos, and syndet bars.
Is SodiumLauroyl Methyl Isethionate clean?
From a clean-beauty perspective, it is generally well accepted because it has a lower irritation profile than harsher anionic cleansers and has no major restricted-list profile. Like most cleansing surfactants, it can still be drying at higher active levels or in poorly buffered formulas.
Is SodiumLauroyl Methyl Isethionate sustainable?
The fatty portion is commonly sourced from coconut or palm-kernel oil, while the charged head group is synthetically made, so traceability and palm sourcing practices matter. It is generally biodegradable in wastewater conditions, with manufacturing impacts tied to esterification, sulfonation-adjacent chemistry, and salt byproducts.
Is SodiumLauroyl Methyl Isethionate COSMOS-approved?
It is not automatically COSMOS-approved, but compliant grades can be permitted when the feedstocks, processing aids, and supplier documentation meet the standard for derived natural surfactants. Its Green Chemistry fit is moderate, with renewable lipid content and good biodegradability balanced by synthetic processing and non-renewable input possibilities.
How does SodiumLauroyl Methyl Isethionate work chemically?
The molecule is an anionic amphiphile with a C12 lipid tail and a sulfonate head group linked through an ester, which helps explain its foam, mildness, and rinse profile. Typical use is about 3 to 25% active matter in liquid cleansers and higher in solid syndet systems, with best stability usually in mildly acidic to neutral pH because strong alkalinity and prolonged heat can promote ester hydrolysis.
Last updated 2026-08-16