Glyceryl Hydroxystearate

AKA: Octadecanoic acid, Monoester with 1, 2, 3-propanetriol, 1323-42-8, Stearic acid, Monoester with glycerol, Hydroxyoctadecanoic acid, Hydroxystearic acid, Glyceryl monohydroxy stearate
Plant-Derived
Emollient
Cleanser
Emulsifier
Skin Conditioner
Not Clean
OriginTypically derived from vegetable oils such as coconut, palm, or soybean oils as starting materials. Produced through esterification of glycerin with hydroxylated stearic acid or its derivatives.
Hydroxyoctadecanoic acid, monoester with glycerol
Formula
C21H42O5
Mol. Weight
374.60
CAS #
1323-42-8
Form
Wax
Skin Types
●all-skin-types
Best For
Dryness
Pregnancy & Breastfeeding Safe
Yes
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
The paper trail
🔬Peer-reviewednone on file
⚖️Regulatory1 listing →
🛡️Safety-assessed4 reviews →
Counts, not a verdict. A listing isn't a study. The trail, you decide.
EWG
3
CIR
Safe as used
Pregnancy
Yes
CIR Safety Findings
Not Phototoxic
CIR Panel statement found no phototoxicity in the CIR safety assessment (CIR 344)
Concentration Guide
Leave-on0.5–2%
Rinse-offNot reported
0%50%100%
CIR reported use · 2014 survey
Regulatory Status
USA✔ permitted
EU⚠ restricted
JAPAN⚠ restricted
CANADA⚠ restricted
Verified Jun 2026
Data: PubChem · CosIng · EWG · CIR