murphyTridecyl Stearate
AKA: Octadecanoic acid, Tridecyl ester, LIPONATE TDS, ETHOX TDS, UNIFLEX 188
Plant-Derived
Emollient
Skin Conditioner
Clean
OriginDerived from long-chain fatty acids and stearic acid through synthetic esterification processes. Produced by esterifying stearic acid with tridecyl alcohol via catalytic synthesis.
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
C31H62O2
Mol. Weight
466.80
CAS #
31556-45-3
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.
Verified Jun 2026
Data: PubChem · CosIng · EWG · CIR