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Polymethylsilsesquioxane/Trimethylsiloxysilicate
AKA “Silicone Resin, Polymethylsilsesquioxane, Silicone Elastomer”
Ingredient
Ingredient Facts
Polymethylsilsesquioxane/Trimethylsiloxysilicate
AKA: Silicone Resin, Silicone Elastomer
Ingredient · Not Reported · EWG: 4
Synthetic
Silicone
Not Clean
Polymethylsilsesquioxane/Trimethylsiloxysilicate is the product of the reaction of Polymethylsilsesquioxane and Trimethylsiloxysilicate
CAS #
-
Form
Powder
See origin →
Functions
Not Reported
Creates silky smooth texture
Provides lightweight skin feel
Helps improve product spreadability
Traditional Use
Developed from silicone chemistry in the mid-20th century. Originally created for industrial applications before adoption in cosmetics as a silky texture-enhancer and mattifying agent.
Skin Types
●all-skin-types
Best For
General
Pregnancy & Breastfeeding Safe
Yes
EWG
4
CIR
Safe as used
Pregnancy
Yes
CIR Safety Findings
Not a Sensitizer
medical-approval
all-shades-safe
Regulatory Status
USA✔ permitted
EU⚠ restricted
JAPAN⚠ restricted
CANADA⚠ restricted
Verified Jun 2026
Data: CosIng · EWG · CIR