Dimethiconol Isostearate
AKA “Silicone-Isostearate Complex, Dimethiconol Isostearate”
Synthetic
Ingredient Facts
Dimethiconol isostearate
AKA: Silicone-Isostearate Complex
Synthetic · Emollient · EWG: 4
Plant-Derived Synthetic
Emollient
Occlusive
Skin Conditioner
Silicone
Synthetic
Clean
A silky conditioning agent that softens and smooths skin, leaving it feeling supple and hydrated without a greasy residue.
CAS #
133448-14-3
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.
Film Forming
Creates a physical seal on skin to lock moisture in and keep irritants out. The "slugging" ingredient — barrier protection.
Locks In Moisture
Traditional Use
A synthetic compound developed in the 20th century combining silicone with isostearic acid, a branched fatty acid. Created to improve conditioning, emolliency, and spreadability in contemporary skincare and haircare.
Skin Types
●all-skin-types
Best For
Dryness
Melanin-Rich Skin
Suitable
Pregnancy & Breastfeeding Safe
Yes
Verified Feb 2026
Data: CosIng · EWG · CIR