Soytrimonium Chloride
molecular structure · PubChem
AKA: Soybean Trimonium Chloride, Soy Quaternary
Synthetic
Preservative
Cleanser
Emulsifier
Skin Conditioner
Hair Care
Not Clean
OriginDerived from soybean protein, a plant-based source modified through chemical synthesis into a quaternary ammonium compound.
Produced by reacting soy protein hydrolysates with trimethylamine and then quaternizing with chloride to create a cationic surfactant.
Quaternary ammonium compounds, trimethylsoya alkyl, chlorides
CAS #
61790-41-8
Skin Types
●all-skin-types
Best For
General
Pregnancy & Breastfeeding Safe
Yes
Allergen Warning
⚠️ Soy
Functions
Antistatic
Hair Conditioning
A catch-all term for ingredients that improve how skin looks and feels — softer, smoother, more supple. The workhorse behind most moisturizers.
Preservative
Keeps your product from growing bacteria, mold, or yeast. Without these, that jar of cream becomes a petri dish in about a week.
Cleansing
Makes oil and water mix so dirt, makeup, and sunscreen can actually be washed away. The reason your face wash foams.
Emulsifying
Forces oil and water to stay mixed instead of separating into layers. The unsung hero holding your lotion together.
Reduces Static
Conditions Hair
Preserves Formula
Cleansing Surfactant
The paper trail
🔬Peer-reviewed1 paper →
⚖️Regulatory1 listing →
🛡️Safety-assessed2 reviews →
Counts, not a verdict. A listing isn't a study. The trail, you decide.
Verified Jun 2026
Data: CosIng · EWG · CIR
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