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SODIUM ACRYLATE/HYDROXYETHYL ACRYLAMIDE COPOLYMER.

Valuable CAS - / ANTISTATIC, FILM FORMING, HAIR CONDITIONING, HAIR FIXING

Sodium Acrylate/Hydroxyethyl Acrylamide Copolymer is a synthetic polymer engineered to enhance cosmetic formulations. It functions as an effective emulsifier, stabilizer, and texture improver, contributing to desirable product consistency and feel. Beyond its textural benefits, it also supports skin hydration and barrier integrity.

Summary

Texture Enhancer Emulsifier/Stabilizer Thickener Dispersing Agent Opacifier Film Former Moisture Retention Skin Barrier Support Viscosity Regulator

Science

Mechanism of Action

This polymer primarily operates by stabilizing oil-in-water emulsions, preventing phase separation and maintaining product homogeneity. It also acts as a thickener, imparting a pleasant, non-sticky, and supple texture, and can influence how a product's initial feel transforms upon skin contact. Furthermore, it forms a light, breathable film on the skin's surface, which aids in moisture retention, reinforces the skin barrier, and offers protection against environmental stressors like pollution, leaving the skin feeling soft and smooth.

Research

Clinical Evidence

High confidence
Effective range 0.3–3%
Optimal

3%

Transparency

Dusting Analysis

Not commonly dusted

The Formula

Formulation

Solubility
Both
Optimal pH 3 – 12
0 7 14

Stability

This copolymer demonstrates excellent stability and efficacy across a remarkably broad pH range, from 3.0 to 12.0, making it suitable for a wide variety of formulas, including low-pH exfoliants. It can be incorporated into formulations efficiently without requiring the application of heat.

Conflicts

  • Avoid use with nitrosating systems when dealing with related acrylamide/acrylate copolymers.
  • Ensure minimum purity of 99% for related copolymers to prevent impurities.
  • Nitrosamine content in related copolymers should not exceed 50 µg/kg in the final formulation.
  • Store related copolymers in nitrite-free containers to prevent unwanted reactions.
  • Finished products containing related copolymers should not exceed a secondary amine content of 0.5%.

Safety

Safety Profile

CIR Status
Safe as used
Max tested
3%
Sensitization risk Low

The Cosmetic Ingredient Review (CIR) Expert Panel has deemed 'Sodium Acrylate/Hydroxyethyl Acrylamide Copolymer' safe for use in cosmetics under current practices and concentrations. Formulators must ensure that the concentration of the acrylamide monomer in the final cosmetic product does not exceed 5 ppm, a standard also overseen by regulatory bodies such as the US FDA.

Your Skin

Skin Compatibility

Yes Normal
Yes Dry
Yes Oily
Yes Sensitive
Irritancy Unknown
Comedogenicity Unknown

Our Assessment

Verdict

Valuable

A highly versatile and well-tolerated polymer, Sodium Acrylate/Hydroxyethyl Acrylamide Copolymer is valuable for enhancing product texture and stability while contributing to skin hydration and barrier protection across all skin types.

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