AKA: Propanesulfonic acid, Sodium salt (1:1), 869737-84-8, SURFONIC SMI, TAURANOL SCMI 85, SODIUM METHYL ISETHIONATE [INCI], PROPANESULFONIC ACID, MONOSODIUM SALT
Synthetic
Cleanser
Emulsifier
Clean
OriginSynthesized from isethionic acid and methanol through esterification and neutralization with sodium hydroxide. Produced via chemical synthesis combining isethionic acid derivatives with methyl alcohol under controlled conditions.
Propanesulfonic acid, 1(or 2)-hydroxy-, sodium salt (1:1)
Formula
C3H7NaO4S
Mol. Weight
162.14
CAS #
869737-84-8
Skin Types
●all-skin-types
Best For
General
Pregnancy & Breastfeeding Safe
Yes
Functions
Emulsifying
Forces oil and water to stay mixed instead of separating into layers. The unsung hero holding your lotion together.
Surfactant Emulsifying, Anti
Inflammatory, Antimicrobial, Fights Acne, Mixes oil and water
The paper trail
🔬Peer-reviewed1 paper →
⚖️Regulatory1 listing →
🛡️Safety-assessed1 review →
Counts, not a verdict. A listing isn't a study. The trail, you decide.
EWG
1
CIR
Safe as used
Pregnancy
Yes
Concentration Guide
CIR's newest survey reports no concentration of use.
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