Stearoyl Ethyltrimonium Methosulfate
molecular structure · PubChem
AKA: Surfactive V 18, Stearoyl ethyltrimonium methosulfate [INCI], 114519-87-8, Ethanaminium, Methyl sulfate, Methyl sulfate (1:1)
Plant-Derived
Cleanser
Emulsifier
Plant Oil
Not Clean
The CIR Expert Panel concluded the following ingredients are safe in the present practices of use and concentration described in the safety assessment when formulated to be non-irritating...Stearoyl Ethyltrimonium Methosulfate...
Formula
C24H51NO6S
Mol. Weight
481.70
CAS #
-
Form
Powder
Functions
Emulsifying
Forces oil and water to stay mixed instead of separating into layers. The unsung hero holding your lotion together.
Surfactant Emulsifying
Antimicrobial
Fights Acne
Antioxidant
Mixes oil and water
Traditional Use
A synthetic conditioning agent developed in the late 20th century by combining stearoyl chemistry with quaternary ammonium compounds. Created specifically for hair conditioning and antistatic benefits in cosmetic formulations.
Skin Types
●all-skin-types
Best For
General
Pregnancy & Breastfeeding Safe
Yes
The paper trail
🔬Peer-reviewednone on file
⚖️Regulatory1 listing →
🛡️Safety-assessed1 review →
Counts, not a verdict. A listing isn't a study. The trail, you decide.
Verified Jun 2026
Data: PubChem · CosIng · EWG · CIR