Stearoxytrimethylsilane

AKA “Trimethyl(octadecyloxy)silane, 18748-98-6, Silane, trimethyl(octadecyloxy)-, stearoxy trimethylsilane, stearyloxytrimethylsilane, stearoxy trimethyl silane, EINECS 242-554-8, 9862TW94B2, SILCARE SILICONE 1M71”

Emollient

Ingredient Facts

Stearoxytrimethylsilane

AKA: Trimethyl(octadecyloxy)silane, 18748-98-6, Trimethyl(octadecyloxy)-, Stearoxy trimethylsilane, Stearyloxytrimethylsilane, Stearoxy trimethyl silane, EINECS 242-554-8, 9862TW94B2, SILCARE SILICONE 1M71

Emollient · Emollient · EWG: 1

Plant-Derived

Emollient

Skin Conditioner

Silicone

Clean

Trimethyl(octadecyloxy)silane

Formula

C21H46OSi

Mol. Weight

342.70

CAS #

18748-98-6

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

Synthetic silicone derivative combining stearic acid with trimethylsilane chemistry, developed for cosmetic applications in the late 20th century. Used to provide water-repellent and conditioning properties.