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Polymethyl Acrylate
AKA “PMA, poly(methyl acrylate)”
Ingredient
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Ingredient Facts
Polymethyl acrylate
AKA: PMA, Poly(methyl acrylate)
Ingredient · Film Forming · EWG: 2
Synthetic
Occlusive
Clean
Methyl 2-propenoate, homopolymer
CAS #
9003-21-8
Form
Powder
See origin →
Functions
Film Forming
Creates a physical seal on skin to lock moisture in and keep irritants out. The "slugging" ingredient — barrier protection.
Wound Healing
Antimicrobial
Boosts Collagen
Creates protective layer
Traditional Use
A synthetic polymer developed in the mid-20th century. Used in cosmetics as a film-former and suspending agent in place of traditional plant-derived gums.
Skin Types
●all-skin-types
Best For
General
Pregnancy & Breastfeeding Safe
Yes
EWG
2
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