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Isononyl Isononanoate
AKA “7-methyloctyl 7-methyloctanoate, 42131-25-9, WE(8:0(7Me)/8:0(7Me)), DTXSID80962298, RefChem:106386, DTXCID801390107, Isononanoicacid, isononyl ester (9CI), SCHEMBL5807541, CHEBI:196213”
Synthetic
Ingredient Facts
Isononyl isononanoate
AKA: 7-methyloctyl 7-methyloctanoate, 42131-25-9, WE(8:0(7Me)/8:0(7Me)), DTXSID80962298, RefChem:106386, DTXCID801390107, Isononanoicacid, Isononyl ester (9CI), SCHEMBL5807541, CHEBI:196213
Synthetic · Skin Conditioning · EWG: 1
Synthetic
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.
Effective at 32.02%
Formula
C18H36O2
Mol. Weight
284.50
CAS #
59219-71-5, 42131-25-9
Form
Liquid
See origin →
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.
Reduces Static
Softens & Smooths
Conditions Skin
Reduces Flyaways
Traditional Use
This does not appear to be a valid ingredient designation; unable to provide historical use information.
Skin Types
●all-skin-types
Best For
General
EWG
1
CIR
Insufficient
Pregnancy
—
CIR Safety Findings
Not a Sensitizer
all-shades-safe
Concentration Guide
0.03%
64.0%
0%90%
Effective Range
CIR reported use: 0.07-4 | >0.1-25 | 0.07-53 | 0.03-64
Regulatory Status
USAunder review
CANADA✔ permitted
Regulatory Agencies
Verified Jun 2026
Data: PubChem · CosIng · EWG · CIR