Sodium Oleyl Methyl Isethionate

Sodium Oleyl Methyl Isethionate molecular structure
molecular structure · PubChem
AKA: SOMI, Oleic Acid Surfactant
Synthetic
Cleanser
Not Clean
OriginSynthesized from oleyl alcohol and methyl isethionate, derived from fatty alcohol precursors. Produced through esterification and sulfonation reactions to create the final surfactant compound.
9-Octadecenoic Acid (9Z)-, Methyl-2-Sulfoester, Sodium Salt
CAS #
880353-25-3
Form
Liquid
Skin Types
●all-skin-types
Best For
General
Pregnancy & Breastfeeding Safe
Yes
Functions
Cleansing
Makes oil and water mix so dirt, makeup, and sunscreen can actually be washed away. The reason your face wash foams.
Foam Boosting
Surfactant Foam Boosting
Anti-Inflammatory
Antimicrobial
Fights Acne
Removes dirt and impurities
Enhances lather
The paper trail
🔬Peer-reviewednone on file
⚖️Regulatory1 listing →
🛡️Safety-assessed0 reviews
Counts, not a verdict. A listing isn't a study. The trail, you decide.
EWG
4
CIR
Safe as used
Pregnancy
Yes
Concentration Guide
CIR lists it as not reported to be in use.
CIR · report published 2017
Regulatory Status
USA✔ permitted
EU⚠ restricted
JAPAN⚠ restricted
CANADA⚠ restricted
Verified Jun 2026
Data: CosIng · EWG · CIR