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ETHYLENE/SODIUM ACRYLATE COPOLYMER.

Valuable CAS 25750-82-7 / 25749-98-8 / BINDING, EMULSION STABILISING, FILM FORMING, OPACIFYING

A versatile polymer, Ethylene/Sodium Acrylate Copolymer plays a crucial role in enhancing cosmetic formulations. It functions primarily to improve product texture, stabilize emulsions, and create a protective film on the skin, contributing to enhanced hydration.

Summary

binding emulsion stabilising film forming thickening suspending agent conditioning opacifying

Science

Mechanism of Action

This copolymer operates by forming a breathable, protective film on the skin's surface, which actively minimizes transepidermal water loss (TEWL) and thereby boosts skin hydration. This film also facilitates the controlled release of other active ingredients. Beyond its film-forming capabilities, it acts as a highly effective thickening agent, imparting a desirable, smooth viscosity to formulations. Furthermore, it serves as a robust stabilizing agent, crucial for preventing the separation of oil and water phases in emulsions and ensuring consistent product integrity. Its conditioning properties also improve sensory feel in hair and skin applications.

Research

Clinical Evidence

High confidence
Effective range 0.5–25%
Optimal

N/A

Key findings

  1. 01 Concentrations as low as 0.5% are utilized for improving product texture, stabilizing formulations, or suspending ingredients in an emulsion.
  2. 02 For leave-on dermal products where film-forming or binding properties are desired, an effective concentration of 25% is commonly employed.

Transparency

Dusting Analysis

Not commonly dusted

Ethylene/Sodium Acrylate Copolymer is a formulation polymer, primarily used for its rheological and film-forming properties, and is not typically associated with dusting concerns related to high concentrations of active ingredients.

The Formula

Formulation

Solubility
Water
Optimal pH N/A
0 7 14

Stability

As a water-soluble anionic polymer, Ethylene/Sodium Acrylate Copolymer demonstrates remarkable adaptability and stability across a broad pH spectrum, encompassing acidic, neutral, and alkaline environments. It also exhibits high tolerance to heat and shear forces, ensuring robust performance in diverse formulations.

Safety

Safety Profile

CIR Status
Safe as used with restrictions
Max tested
25%
Sensitization risk Low

The Cosmetic Ingredient Review (CIR) Expert Panel has deemed Ethylene/Sodium Acrylate Copolymer safe for cosmetic use under current practices, provided formulations are non-irritating to the skin. This necessitates the use of highly purified copolymers to mitigate any potential irritation from residual monomers. The maximum recommended concentration for leave-on dermal products is 25%, while concentrations up to 98.6% are reported in nail formulations.

Your Skin

Skin Compatibility

Yes Normal
Yes Dry
No Oily
No Sensitive
Irritancy Low
Comedogenicity Low

Our Assessment

Verdict

Valuable

Ethylene/Sodium Acrylate Copolymer is a valuable multifunctional ingredient, enhancing product texture, stability, and delivering measurable hydration benefits through film formation, particularly suited for dry and normal skin types.

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