Isodecyl Oleate
molecular structure · PubChem
AKA: Oleic acid, Isodecyl ester, 9-Octadecenoic acid, 59231-34-4, ISODECYL OLEATE [VANDF]
Synthetic
Emollient
Skin Conditioner
Clean
The CIR Expert Panel concluded that the alkyl esters, listed subsequently, are safe in the present practices of use and concentration described in this safety assessment when formulated to be non-irritating.
Effective at 44.05%
Formula
C28H54O2
Mol. Weight
422.70
CAS #
59231-34-4
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
Synthetic ester combining isodecyl alcohol with oleic acid (from olive or other oils), developed as a cosmetic emollient with improved stability over natural oils.
EWG
1
CIR
Safe as used
Pregnancy
Yes
CIR Safety Findings
Not a Sensitizer
medical-approval
all-shades-safe
Concentration Guide
0.1%
88.0%
0%100%
Reported use
CIR reported use: 0.5-62 | 0.5-20 | 0.1-88
Regulatory Agencies
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