PEG-3 Distearate
AKA “Ethane-1, 2-diol;heptadecanoic acid, ethylene glycol;heptadecanoic acid, QYJQHDWGURXGNL-UHFFFAOYSA-N, C19H40O4, Protamate 200-DS(TM), PEG-4 Distearate(TM)
Synthetic
Ingredient Facts
Peg-3 distearate
AKA: Ethane-1, 2-diol;heptadecanoic acid, Ethylene glycol;heptadecanoic acid, QYJQHDWGURXGNL-UHFFFAOYSA-N, C19H40O4, Protamate 200-DS(TM), PEG-4 Distearate(TM)
Synthetic · Emollient · EWG: 4
Plant-Derived Synthetic
Emollient
Cleanser
Emulsifier
Skin Conditioner
Plant Oil
Synthetic
Clean
A naturally-derived helper that blends oil and water together, keeping your formula smooth and stable while ensuring even product coverage on skin.
Formula
C19H40O4
Mol. Weight
332.50
CAS #
9005-08-7
See origin →
Functions
Emulsifying
Forces oil and water to stay mixed instead of separating into layers. The unsung hero holding your lotion together.
Skin Conditioning
A catch-all term for ingredients that improve how skin looks and feels — softer, smoother, more supple. The workhorse behind most moisturizers.
Emollient
Fills in the tiny cracks between skin cells to make everything feel smooth and soft. The "silky finish" ingredient.
Emulsifier
Mixes Oil & Water
Traditional Use
A synthetic polyethylene glycol-based emulsifier developed in the 20th century cosmetics industry. Designed to stabilize and thicken formulations by bridging oil and water components.
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 Status
USApermitted
EUrestricted
JAPANrestricted
CANADArestricted
Verified Feb 2026
Data: PubChem · CosIng · EWG · CIR