Ammonium Acryloyldimethyltaurate is a synthetic rheology modifier and polymer component used to create lightweight, “quick-break” gel textures in skincare. It functions as a powerful stabilizer for oil-in-water emulsions, providing a sophisticated sensory profile without the stickiness often associated with traditional thickeners.
- INCI Name:
- Ammonium Acryloyldimethyltaurate
- Chemical/Scientific Name:
- 2-Acrylamido-2-methylpropanesulfonic acid ammonium salt
- Common Aliases:
- AMPS Ammonium Salt, Component of Aristoflex polymers
| Category: | Thickeners |
| Source Origin: | Synthetic |
| Comedogenic Rating: | 0 |
| Primary Industries: | Cosmetics, Personal Care, Pharmaceuticals |
| Solubility: | Water-dispersible |
At a Glance: Properties & Effects
| Texture Enhancement | |
| Formula Stability | |
| Irritation Risk |
- Primary Benefits:
- Creates elegant, non-greasy, and non-tacky topical formulations.
- Stabilizes emulsions containing high oil loads or difficult-to-suspend particles.
- Provides an immediate cooling and refreshing sensation upon application.
- Functions across a broad pH range without requiring additional neutralizers.
- Potential Risks:
- Sensitivity to electrolytes (salts), which can cause the gel structure to collapse.
- Incompatible with high concentrations of mineral acids or certain cationic ingredients.
Biological Action & Cosmetic Profile
The molecular architecture of Ammonium Acryloyldimethyltaurate features sulfonic acid groups that are pre-neutralized with ammonium. When dispersed in Aqua, these polymer chains uncoil and expand, creating a three-dimensional network that traps water and stabilizes oils. This mechanism allows formulators to achieve high viscosity and suspension power without the “stringy” texture typical of Xanthan Gum or the neutralization requirements of a standard Carbomer.Upon contact with the skin, the polymer structure reacts to the natural salts present on the skin’s surface. This electrolyte sensitivity causes the gel to “break,” instantly releasing the encapsulated water and active ingredients for a refreshing, hydrating effect. Unlike heavier waxes or oils, this ingredient leaves a matte, velvety finish, making it ideal for oily and combination skin types.Formulations utilizing this monomer, such as Ammonium Acryloyldimethyltaurate Vp Copolymer, demonstrate exceptional stability in the presence of organic solvents. It maintains its structural integrity even when paired with Glycerin or certain glycols, ensuring that the cosmetic remains uniform over its shelf life.
Broader Applications & Origins
Synthetic production of this ingredient ensures a high degree of purity and batch-to-batch consistency that natural gums cannot always provide. It was specifically developed to bridge the gap between high-performance industrial rheology and the aesthetic demands of luxury skincare. While most commonly found in face creams and “water gels,” it is also utilized in sunscreens to help distribute UV filters evenly across the skin.Manufacturing this polymer involves the controlled polymerization of sulfonic acid monomers. The resulting white powder is highly hygroscopic, meaning it readily attracts water, which facilitates the rapid hydration needed during the manufacturing process of emulsions.
Routine Integration
- Synergies:
- Works exceptionally well with Sodium Hyaluronate to create deeply hydrating, oil-free serums.
- Compatible with Niacinamide and other water-soluble vitamins that do not significantly alter the ionic strength of the formula.
- Complements Dimethicone to produce a silky, primer-like finish on the skin.
- Conflicts:
- Highly ionic ingredients, such as Zinc Pca or sea salt, may liquefy the gel.
- Very low pH formulations (e.g., high-strength Glycolic Acid) can degrade the polymer over time.
Clinical Consensus & Safety
Dermatological assessments by the Cosmetic Ingredient Review (CIR) Expert Panel have concluded that Ammonium Acryloyldimethyltaurate and its related copolymers are safe for use in cosmetics. Clinical data indicates no significant potential for skin irritation or sensitization at typical usage concentrations (generally up to 1.5% as a thickener and higher in specialized gels). Because it is a large polymer, it does not penetrate the skin barrier, further minimizing any risk of systemic toxicity.
Is this ingredient safe for acne-prone skin?
Yes. It has a comedogenic rating of 0, meaning it does not clog pores. Its ability to create oil-free gel textures makes it a preferred choice for those with oily or bimodal skin concerns.
Why does my gel moisturizer sometimes turn watery?
This typically happens if the product is mixed with salt-heavy serums or applied to very sweaty skin. The electrolytes break down the polymer’s structure, causing it to lose its thickness and return to a liquid state.
Is Ammonium Acryloyldimethyltaurate a microplastic?
Under current ECHA definitions, water-soluble or dispersible polymers used as liquid rheology modifiers are generally not classified as solid microplastic particles, though they are synthetic polymers.