Polyglyceryl-3 Diisostearate
AKA “Polyglyceryl-3 Diisostearate
Synthetic
Ingredient Facts
Polyglyceryl-3 diisostearate
Synthetic · Emollient · EWG: 1
Plant-Derived Synthetic
Emollient
Cleanser
Emulsifier
Skin Conditioner
Synthetic
Clean
A gentle emulsifier derived from natural ingredients that helps blend oil and water-based components, creating smooth, stable formulas that feel soft on skin.
CAS #
66082-42-6, 85666-92-8
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
Brightens Skin
Mixes Oil & Water
Traditional Use
Developed in the mid-20th century as a modern synthetic emulsifier derived from glycerin and isostearic acid. Created to provide stable emulsification in cosmetic formulations where traditional plant-based emulsifiers proved insufficient.
Skin Types
all-skin-types, gentle
Best For
General
Melanin-Rich Skin
Suitable
Pregnancy & Breastfeeding Safe
Yes
EWG
1
CIR
Safe
Pregnancy
Yes
CIR Safety Findings
Not a Sensitizer
ewg-1
medical-approval
pregnancy-nursing-safe
all-shades-safe
Regulatory Status
USApermitted
EUrestricted
JAPANrestricted
CANADArestricted
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Verified Feb 2026
Data: CosIng · EWG · CIR