Isodecyl Hydroxystearate

Isodecyl Hydroxystearate 1
molecular structure · PubChem CID 57376812
AKA: 8-methylnonyl 2-hydroxyoctadecanoate
Plant-Derived
Emollient
Skin Conditioner
Not Clean
OriginDerived from plant-based fatty acids, typically sourced from coconut or palm oil feedstocks. Synthesized through hydrogenation and esterification of hydroxylated stearic acid derivatives.
Octadecanoic acid, hydroxy-, 3,7-dimethyloctyl ester
Formula
C28H56O3
Mol. Weight
440.70
CAS #
29383-27-5
Form
Liquid
Skin Types
●all-skin-types
Best For
Dryness
Pregnancy & Breastfeeding Safe
Yes
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
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.
EWG
3
CIR
Safe as used
Pregnancy
Yes
Concentration Guide
CIR lists it as not reported to be in use.
CIR · report published 2015
Regulatory Status
USA✔ permitted
EU⚠ restricted
JAPAN⚠ restricted
CANADA⚠ restricted
Verified Jun 2026
Data: PubChem · CosIng · EWG · CIR