Polyglyceryl-4 Tristearate

Polyglyceryl-4 Tristearate molecular structure
molecular structure · PubChem
Plant-Derived
Emollient
Cleanser
Emulsifier
Skin Conditioner
Plant Oil
Not Clean
triester of tetraglycerol and stearic acid
CAS #
99734-29-9
Functions
Emollient
Fills in the tiny cracks between skin cells to make everything feel smooth and soft. The "silky finish" ingredient.
Emulsifying
Forces oil and water to stay mixed instead of separating into layers. The unsung hero holding your lotion together.
Locks In Moisture
Traditional Use
A synthetic emulsifier created in the mid-20th century from glycerin and stearic acid. Designed to replace traditional animal-derived emulsifiers with a more stable, consistent alternative for cosmetic manufacturing.
EWG
4
CIR
Safe as used
Pregnancy
Yes
CIR Safety Findings
Not a Sensitizer
medical-approval
all-shades-safe
Regulatory Status
USA✔ permitted
EU⚠ restricted
JAPAN⚠ restricted
CANADA⚠ restricted
Skin Types
●all-skin-types
Best For
General
Pregnancy & Breastfeeding Safe
Yes
The paper trail
🔬Peer-reviewednone on file
⚖️Regulatory1 listing →
🛡️Safety-assessed1 review →
Counts, not a verdict. A listing isn't a study. The trail, you decide.
Verified Jun 2026
Data: CosIng · EWG · CIR