murphyIsodecyl Oleate
AKA: Oleic acid, Isodecyl ester, 9-Octadecenoic acid, 59231-34-4, ISODECYL OLEATE [VANDF]
Synthetic
Emollient
Skin Conditioner
Clean
OriginDerived from oleic acid and isodecyl alcohol, both petroleum or plant-derived fatty compounds. Synthesized through esterification, combining oleic acid with isodecyl alcohol under catalytic conditions.
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.
Formula
C28H54O2
Mol. Weight
422.70
CAS #
59231-34-4
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-assessed3 reviews →
Counts, not a verdict. A listing isn't a study. The trail, you decide.
EWG
1
CIR
Safe as used
Pregnancy
Yes
CIR Safety Findings
Not a Sensitizer
1 study / 1 not sensitizing (CIR 623)
Eye Irritant in Testing
1 study / 1 irritating / reactions slight (CIR 623)
Mixed Skin Irritation Results
4 studies / 1 irritating / 1 mixed / 2 not irritating / reactions moderate (CIR 242 and 623)
Concentration Guide
Leave-on0.07–4%
Rinse-off2–3%
0%50%100%
CIR reported use · 2012 survey
Regulatory Agencies
Verified Jun 2026
Data: PubChem · CosIng · EWG · CIR