PEG-40 Soy Sterol
AKA “PEG soy sterol, polyethylene glycol soy sterol
Synthetic
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Ingredient Facts
Peg-40 soy sterol
AKA: PEG soy sterol, Polyethylene glycol soy sterol
Synthetic · Surfactant - Cleansing | Surfactant - Emulsifying · EWG: 4
Plant-Derived
Cleanser
Emulsifier
Synthetic
Not Clean
Sterols, soya (Glycine soja), ethoxylated (40 mol EO average molar ratio) Science: Process: Ethoxylation | Functions: Surfactant - Cleansing, Surfactant - Emulsifying ⚠ Allergen Alert (Soy): Derived from a common allergen source. May cause reactions in sensitive individuals. Safety Ratings: CIR: Safe as used
CAS #
-
Form
Liquid
Plant-Derived
Synthetic. Derived from soybean-derived phytosterols, a plant sterol compound class found in legume oils. Produced through ethoxylation of soy sterols with ethylene oxide, creating a polyethylene glycol-modified surfactant.
Function
Surfactant - Cleansing | Surfactant - Emulsifying
Benefits
Cleansing Surfactant
Emulsifier
Antioxidant Protection
Wound Healing
Removes Impurities
Mixes Oil & Water
Traditional Use
A modern botanical-derived emulsifier combining soy sterols (plant compounds extracted from soybean oil, used historically in traditional Asian medicine) with polyethylene glycol. Developed to create a more natural emulsifier while maintaining modern cosmetic performance.
Skin Types
all-skin-types
Best For
Target
General
Melanin-Rich Skin
Suitable
Pregnancy Safe
Yes
Allergen Warning
⚠️ Soy
Allergen Warning
⚠️ Soy
EWG Score4
CIR Safety Findings
medical-approval, all-shades-safe
Regulatory Status
USAunder review
CANADApermitted
Regulatory Agencies
Verified Feb 2026
Data: CosIng · EWG · CIR