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2-ACRYLAMIDO-2-METHYLPROPANE SULFONIC ACID.

Valuable CAS 15214-89-8 / NOT REPORTED

A highly polar anionic monomer that functions as a powerful hydrating and texture-enhancing ingredient in skincare formulations. This sulfonic acid compound excels at water retention and creates smooth, lubricating films on skin while stabilizing complex formulations containing electrolytes.

viscosity controlling emulsion stabilizing hydrophilic monomer texture enhancer

Science

Functions through its exceptional water-binding capacity and anionic charge properties, creating hydrophilic films that enhance skin lubrication and moisture retention. The sulfonate groups generate charge repulsion that increases water storage space in formulations while improving adhesion and biocompatibility.


Research

Medium confidence
Effective range 1–5%
Optimal

3%

Key findings

  1. 01 AMPS-based copolymers demonstrate significant lubricant properties and rheological enhancement in personal care applications

Transparency

Not commonly dusted

Primarily used as a functional monomer in specialized formulations rather than a marketing ingredient


The Formula

Solubility
Water
Optimal pH 1 – 9
0 7 14

Stability

Exceptionally stable across wide pH range with high thermal resistance and hydrolysis protection. Sodium salt form maintains stability above pH 9.

Synergies

  • hydrogel-forming polymers
  • electrolyte-containing actives
  • water-based moisturizers

Conflicts

  • strong oxidizing agents
  • cationic surfactants
  • multivalent metal ions

Safety

CIR Status
Safe as used
Pregnancy
Safe
Sensitization risk Low

CIR Panel confirms safety of acrylamide/acrylate copolymers in current usage. Raw monomer may cause irritation but is consumed during polymerization process.


Your Skin

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

Our Assessment

Valuable

A versatile technical ingredient that delivers superior hydration and texture benefits with excellent safety profile across all skin types.


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References