murphyPEG-30 Soy Sterol
molecular structure · PubChem
AKA: Soy Sterol Ethoxylate, Phytosterol PEG
Synthetic
Cleanser
Emulsifier
Not Clean
OriginDerived from soybean oil sterols chemically combined with polyethylene glycol chains. Produced through ethoxylation, a process adding approximately 30 moles of ethylene oxide to sterol molecules.
PEG-30 Soy Sterol is a polyethylene glycol derivative of sterols obtained from Glycine Soja (Soybean) Oil with an average of 30 moles of ethylene oxide
Skin Types
●all-skin-types
Best For
Dryness
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.
Emulsifying
Forces oil and water to stay mixed instead of separating into layers. The unsung hero holding your lotion together.
Cleansing Surfactant
Emulsifier
Antioxidant Protection
Locks In Moisture
Reduces Inflammation
Removes Impurities
Mixes Oil & Water
The paper trail
🔬Peer-reviewednone on file
⚖️Regulatory1 listing →
🛡️Safety-assessed2 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
Leave-on0.35%
Rinse-offNot reported
0%50%100%
CIR reported use · 2020 survey
Regulatory Agencies
Verified Jun 2026
Data: CosIng · EWG · CIR