Dilinoleic Acid

AKA: 6-(9-Carboxy-1-nonenyl)-4, 5-dihexylcyclohex-2-ene-1-octanoic acid, Linoleic acid dimer, Hystrene 3695, CENTURY D 77, 9, 12-OCTADECADIENOIC ACID, DIMER
Synthetic
Skin Conditioner
Synthetic
Clean
OriginDerived from sunflower and safflower seed oils through selective extraction of linoleic acid components. Produced through esterification or conjugation of linoleic acids to create the dilinoleic acid compound.
The CIR Expert Panel concluded that the following ingredients are safe in the present practices of use andconcentration described in the safety assessment when formulated to be non-irritating and non-sensitizing, which may be basedon a QRA...Dilinoleic Acid...
Formula
C36H64O4
Mol. Weight
560.90
CAS #
6144-28-1, 26085-09-6
State
Solid
Skin Types
●all-skin-types
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.
Buffering
Softens & Smooths
Conditions Skin
Smooths and softens skin
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.
EWG
1
CIR
—
Pregnancy
—
Concentration Guide
Leave-on0.14%
Rinse-off2.5%
0%50%100%
CIR reported use · 2016 survey
Regulatory Status
EU⚠ restricted
JAPAN⚠ restricted
CANADA⚠ restricted
Regulatory Agencies
Verified Jun 2026
Data: PubChem · CosIng · EWG