murphyIsostearyl Benzoate
AKA: Benzoic acid, Isooctadecyl ester, Isooctadecanol, FINSOLV SB, ISOOCTADECYL BENZOATE
Plant-Derived
Emollient
Skin Conditioner
Hair Care
Not Clean
OriginDerived from isostearic acid and benzoic acid, both produced from petroleum or plant-derived fatty acids. Synthesized through esterification, combining isostearic acid with benzoic acid under catalytic conditions.
Benzoic acid, isooctadecyl ester
Formula
C25H42O2
Mol. Weight
374.60
CAS #
34364-24-4
Form
Liquid
Skin Types
●all-skin-types
Best For
Dryness
Pregnancy & Breastfeeding Safe
Yes
Functions
Hair Conditioning
A catch-all term for ingredients that improve how skin looks and feels — softer, smoother, more supple. The workhorse behind most moisturizers.
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-assessed1 review →
Counts, not a verdict. A listing isn't a study. The trail, you decide.
EWG
4
CIR
Safe as used
Pregnancy
Yes
CIR Safety Findings
Not a Skin Irritant
1 study / 1 not irritating (CIR 578)
Not a Sensitizer
1 study / 1 not sensitizing (CIR 578)
Eye Irritant in Testing
1 study / 1 irritating / reactions slight (CIR 578)
Concentration Guide
Leave-on1%
Rinse-offNot reported
0%50%100%
CIR reported use · report published 2012
Regulatory Agencies
Verified Jun 2026
Data: PubChem · CosIng · EWG · CIR