Isostearyl Linoleate

AKA “Protachem isl, 127358-80-9, Isostearyl linoleate [INCI], UNII-4778M3HR0N, 4778M3HR0N, 9, 12-Octadecadienoic acid (Z, Z)-, isooctadecyl ester, 12-Octadecadienoic acid (9Z, 12Z)-, RefChem:149998, 16-methylheptadecyl (9Z, 12Z)-octadeca-9, 12-dienoate”

Emollient

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Ingredient Facts

Isostearyl linoleate

AKA: Protachem isl, 127358-80-9, Isostearyl linoleate [INCI], UNII-4778M3HR0N, 4778M3HR0N, 9, 12-Octadecadienoic acid (Z, Z)-, Isooctadecyl ester, 12-Octadecadienoic acid (9Z, 12Z)-, RefChem:149998, 16-methylheptadecyl (9Z, 12Z)-octadeca-9, 12-dienoate

Emollient · Emollient · EWG: 1

Plant-Derived

Emollient

Skin Conditioner

Clean

9,12-Octadecadienoic Acid (9Z,12Z)-, Isooctadecyl Ester

Formula

C36H68O2

Mol. Weight

532.90

CAS #

127358-80-9

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.

Emollient

Fills in the tiny cracks between skin cells to make everything feel smooth and soft. The "silky finish" ingredient.

Locks In Moisture

Traditional Use

A synthetic ester combining isostearyl alcohol with linoleic acid, a naturally-occurring essential fatty acid. Developed to provide skin conditioning and barrier support benefits in modern skincare formulations.