PEG-5 Soy Sterol
molecular structure · PubChem
AKA: Polyethylene Glycol Soy Sterol, PEG-5 Soybean Sterol
Allergen Warning
⚠️ Soy
Synthetic
Cleanser
Emulsifier
Amino Acid
Not Clean
Sterols, soya (Glycine soja), ethoxylated (5 mol EO average molar ratio)
CAS #
61791-24-0
Functions
Emulsifying
Forces oil and water to stay mixed instead of separating into layers. The unsung hero holding your lotion together.
Emulsifier
Fights Bacteria
Locks In Moisture
Wound Healing
Mixes Oil & Water
Traditional Use
A modern polyethylene glycol derivative of plant sterols from soybeans, developed in the late 20th century as a conditioning and emulsifying agent with no significant traditional cosmetic history.
EWG
4
CIR
Reviewed by CIR
Pregnancy
Yes
CIR Safety Findings
all-shades-safe
Regulatory Agencies
Skin Types
●all-skin-types
Best For
General
Pregnancy & Breastfeeding Safe
Yes
The paper trail
🔬Peer-reviewednone on file
⚖️Regulatory1 listing →
🛡️Safety-assessed3 reviews →
Counts, not a verdict. A listing isn't a study. The trail, you decide.
Verified Jun 2026
Data: CosIng · EWG · CIR