PEG-4 Dioleate
Synthetic
Ingredient Facts
Peg-4 dioleate
Synthetic · Emollient · EWG: 4
Synthetic
Emollient
Cleanser
Emulsifier
Skin Conditioner
Synthetic
Clean
Helps blend oil and water-based ingredients together, creating a smooth, uniform texture in skincare and beauty products.
Formula
C38H70O4
Mol. Weight
591.00
CAS #
9005-07-6
Form
Liquid
State
Lemon to orange oily liquid or semi-gel with a mild odor; [JECFA] Liquid; mp = 15 deg C; [Sigma-Aldrich MSDS]
See origin →
Functions
Emulsifying
Forces oil and water to stay mixed instead of separating into layers. The unsung hero holding your lotion together.
Emollient
Fills in the tiny cracks between skin cells to make everything feel smooth and soft. The "silky finish" ingredient.
Skin Conditioning
A catch-all term for ingredients that improve how skin looks and feels — softer, smoother, more supple. The workhorse behind most moisturizers.
Emulsifier
Locks In Moisture
Wound Healing
Antioxidant Protection
Mixes Oil & Water
Traditional Use
Synthetic polyethylene glycol ester developed in the mid-20th century as a surfactant and emulsifier. Created to replace natural soap and provide improved stability in cosmetic formulations.
Skin Types
●all-skin-types
Best For
General
Melanin-Rich Skin
Suitable
Pregnancy & Breastfeeding Safe
Yes
EWG
4
CIR
Safe w/Qualifications
Pregnancy
Yes
CIR Safety Findings
Not a Sensitizer
medical-approval
all-shades-safe
Regulatory Agencies
Verified Feb 2026
Data: PubChem · CosIng · EWG · CIR