Glyceryl Stearate/Acetate

Glyceryl Stearate/Acetate 1
AKA: Acetostearin, Acetomonostearin, Stearin, Glycerol monoacetate monostearate, 3-Propanetriol monoacetate monoctadecanoate
Plant-Derived
Emollient
Skin Conditioner
Not Clean
Octadecanoic acid, monoester with 1,2,3-propanetriol monoacetate
Formula
C23H44O5
Mol. Weight
400.6
CAS #
27177-85-1
Form
Liquid
Functions
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.
Locks In Moisture
Traditional Use
A modern synthetic ingredient combining glycerin, stearic acid, and acetic acid esters. Developed for cosmetic use as an emollient and emulsifying agent.
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
Dryness
Pregnancy & Breastfeeding Safe
Yes
The paper trail
🔬Peer-reviewednone on file
⚖️Regulatory1 listing →
🛡️Safety-assessed3 reviews →
Counts, not a verdict. A listing isn't a study. The trail, you decide.
Verified Jun 2026
Data: PubChem · CosIng · EWG · CIR