Decyl Isostearate
AKA: Decyl isooctadecanoate, 84605-08-3, NIKKOL GS-DIS, DECYL ISOSTEARATE [INCI], Decyl 16-methylheptadecanoate
Synthetic
Emollient
Skin Conditioner
Synthetic
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.
Formula
C28H56O2
Mol. Weight
424.70
CAS #
84605-08-3
Form
Liquid
Functions
Emollient
Fills in the tiny cracks between skin cells to make everything feel smooth and soft. The "silky finish" ingredient.
Skin Conditioning
A catch-all term for ingredients that improve how skin looks and feels — softer, smoother, more supple. The workhorse behind most moisturizers.
Softens & Smooths
Conditions Skin
Smooths and softens skin
Traditional Use
A modern synthetic ester developed in the 20th century as an emollient and skin-conditioning agent. Designed to replicate the sensory benefits of natural oils while providing improved stability and spreadability in cosmetic formulations.
Skin Types
●all-skin-types
Best For
Dryness
Pregnancy & Breastfeeding Safe
Yes
The paper trail
🔬Peer-reviewed1 paper →
⚖️Regulatory0 listings
🛡️Safety-assessed2 reviews →
Counts, not a verdict. A listing isn't a study. The trail, you decide.
Verified Jun 2026
Data: PubChem · CosIng · EWG · CIR