murphySoyamidopropyl Betaine
AKA: Soy Betaine, Soybean Amidopropyl Betaine
Synthetic
Cleanser
Skin Conditioner
Hair Care
Not Clean
OriginDerived from soybean oil fatty acids combined with dimethylaminopropionic acid and glycine derivatives. Synthesized through amidation and betainization of soy-derived fatty acyl chains with amino acid precursors.
1-Propanaminium, 3-amino-N-carboxymethyl-N,N-dimethyl-, N-soybean-acyl derivs., hydroxides, inner salts
CAS #
61789-40-0
Form
Liquid
Skin Types
●all-skin-types
Best For
General
Pregnancy & Breastfeeding Safe
Yes
Allergen Warning
⚠️ Soy
Functions
Cleansing
Makes oil and water mix so dirt, makeup, and sunscreen can actually be washed away. The reason your face wash foams.
Hair Conditioning
A catch-all term for ingredients that improve how skin looks and feels — softer, smoother, more supple. The workhorse behind most moisturizers.
Skin Conditioning
A catch-all term for ingredients that improve how skin looks and feels — softer, smoother, more supple. The workhorse behind most moisturizers.
Cleansing
Makes oil and water mix so dirt, makeup, and sunscreen can actually be washed away. The reason your face wash foams.
Locks in moisture
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
5
CIR
Safe as used
Pregnancy
Yes
CIR Safety Findings
Skin Irritant in Testing (CIR report on the ingredient group)
CIR report statement covering this group of ingredients / not tested individually (CIR 518)
Concentration Guide
Leave-onNot reported
Rinse-off1–2%
0%50%100%
CIR reported use · 2010 survey
Regulatory Agencies
Verified Jun 2026
Data: CosIng · EWG · CIR