Sodium Polymethacrylate
AKA “Polymethacrylate, Polymer Thickener”
Ingredient
Ingredient Facts
Sodium polymethacrylate
AKA: Polymer Thickener
Ingredient · Emulsion Stabilising · EWG: 2
Synthetic
Occlusive
Emulsifier
Clean
2-Propenoic acid, 2-methyl-, homopolymer, sodium salt
CAS #
25086-62-8
See origin →
Functions
Binding
Emulsion Stabilising
Forces oil and water to stay mixed instead of separating into layers. The unsung hero holding your lotion together.
Film Forming
Creates a physical seal on skin to lock moisture in and keep irritants out. The "slugging" ingredient — barrier protection.
Opacifying
Viscosity Controlling
Anti-Inflammatory
Antimicrobial
Fights Acne
Traditional Use
A synthetic polymer developed in the mid-20th century. Used in cosmetics as a film-forming and thickening agent to improve texture and stability.
Skin Types
●all-skin-types
Best For
General
Pregnancy & Breastfeeding Safe
Yes
Glyceryl Polymethacrylate
European Commission
EU Cosmetic Ingredient Database (CosIng)
Sodium Polymethacrylate
European Commission
EU Cosmetic Ingredient Database (CosIng)
Glyceryl Polymethacrylate
Environmental Working Group (EWG)
EWG Skin Deep Cosmetics Database
Sodium Polymethacrylate
Environmental Working Group (EWG)
EWG Skin Deep Cosmetics Database
Verified Jun 2026
Data: CosIng · EWG · CIR