Isotridecyl Isononanoate

AKA: 59231-37-7, Isotridecyl 3, 5, 5-trimethylhexanoate, Wickenol 153, Hexanoic acid, Isotridecyl ester, Isomeric tetramethyl-1-nonyl 3, 5-trimethyl hexanoate
Synthetic
Emollient
Skin Conditioner
Clean
OriginDerived from branched-chain fatty acids and alcohols, belonging to the synthetic ester chemical family. Synthesized through esterification of isotridecyl alcohol with isononanoic acid using acid catalysts.
Isotridecyl 3,5,5-trimethylhexanoate
Formula
C22H44O2
Mol. Weight
340.60
CAS #
59231-37-7
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 558)
Concentration Guide
Leave-on1–21%
Rinse-off3–4%
0%50%100%
CIR reported use · 2012 survey
Regulatory Agencies
Verified Jun 2026
Data: PubChem · CosIng · EWG · CIR
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