Ethylene/Acrylic Acid Copolymer
AKA: EAA Copolymer, Ethylene acrylic acid polymer
Synthetic
Occlusive
Emulsifier
Acid
Not Clean
2-Propenoic acid, polymer with ethene
CAS #
9010-77-9
State
Solid
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
Holds Formula Together
Stabilizes Emulsion
Creates Protective Barrier
Adds Opacity
Creates protective layer
Holds ingredients together
Keeps product blended
Creates creamy opacity
Traditional Use
Synthesized in the 1960s-1970s as a modern polymer. Used in cosmetics as a film-former and thickening agent in hair care and styling products.
Skin Types
●all-skin-types
Best For
General
Pregnancy & Breastfeeding Safe
Yes
The paper trail
🔬Peer-reviewednone on file
⚖️Regulatory1 listing →
🛡️Safety-assessed3 reviews →
Counts, not a verdict. A listing isn't a study. The trail, you decide.
Verified Jun 2026
Data: CosIng · EWG · CIR