Propanediol Diisostearate

Propanediol Diisostearate 1
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Propanediol Diisostearate 2
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Propanediol Diisostearate 3
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AKA: Propanediol Isostearate Ester
Plant-Derived
Emollient
Skin Conditioner
Not Clean
OriginDerived from plant-based oils such as coconut, palm kernel, or soybean through chemical modification processes. Synthesized by esterification of propanediol with isostearic acid or its derivatives.
Propanediol Diisostearate is a cosmetic ingredient used as skin conditioning - emollient. Assessed as safe by the CIR.
CAS #
-
Form
Liquid
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.
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
4
CIR
Safe as used
Pregnancy
Yes
Concentration Guide
CIR lists it as not reported to be in use.
CIR · report published 2017
Regulatory Status
USA✔ permitted
EU⚠ restricted
JAPAN⚠ restricted
CANADA⚠ restricted
Verified Jun 2026
Data: CosIng · EWG · CIR