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AMMONIUM ACRYLOYLDIMETHYLTAURATE/STEARETH-8 METHACRYLATE COPOLYMER.

Valuable CAS - / EMULSION STABILISING, VISCOSITY CONTROLLING

This synthetic copolymer functions as a rheology modifier, enhancing the texture and stability of skincare formulations. It creates light, quick-breaking gels and creams, ideal for a refreshing skin feel.

viscosity controlling emulsion stabilising

Science

As a hydrophobically modified polymer, it forms a 3D network in water, effectively thickening aqueous solutions and stabilizing oil droplets without traditional emulsifiers. This structure delivers a cooling 'quick-break' sensory experience upon application.


Research

Medium confidence
Effective range ≤0.65%
Optimal

0.65%

Key findings

  1. 01 CIR Safety Assessment of Acryloyldimethyltaurate Polymers (2017): Identified 0.65% as the maximum reported concentration for safe use in leave-on products.
  2. 02 CIR Expert Panel / FDA Amended Safety Assessment (2017): Demonstrated low potential for skin irritation and sensitization with similar acryloyldimethyltaurate polymers.

Transparency

Not commonly dusted

Information regarding dusting behavior is not available in the provided research data.


The Formula

Solubility
Water
Optimal pH 4 – 9
0 7 14

Stability

This pre-neutralized polymer thickens without needing additional base. It is sensitive to pH extremes; below 4.0 may cause viscosity loss, and above 9.0 may release ammonia gas. Electrolytes and salts can significantly reduce its viscosity.

Conflicts

  • Electrolytes and salts
  • Cationic surfactants
  • Polyvalent metal ions
  • High concentrations of sodium chloride

Safety

CIR Status
Safe as used
Max tested
0.65%
Sensitization risk Low

Deemed safe for use at current concentrations provided it is formulated to be non-irritating. Residual acrylamide content should be kept to a minimum (typically below 2-5 ppm).


Your Skin

Yes Normal
Yes Dry
Yes Oily
Yes Sensitive
Irritancy Low
Comedogenicity Low

Our Assessment

Valuable

This copolymer is a valuable rheology modifier for creating stable, lightweight, and sensorially pleasant formulations, demonstrating low irritation and comedogenicity.


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