Science
Mechanism of Action
This super-absorbent polymer, commonly referred to as Sodium Polyacrylate, can absorb 100 to 1000 times its mass in water, forming a gel-like substance. Upon application, it creates a thin, protective film on the skin's surface, effectively minimizing transepidermal water loss (TEWL) and establishing a microscopic water reservoir to sustain hydration. Its large molecular structure ensures it remains on the skin's outermost layer, providing surface-level benefits without penetrating the stratum corneum, and can also facilitate controlled release of other active ingredients.
Research
Clinical Evidence
Medium confidenceN/A
Transparency
Dusting Analysis
The Formula
Formulation
Stability
Generally stable under most conditions, but its gel structure is significantly compromised by acids, sodium chloride (table salt), organic solvents (e.g., alcohols, acetone, oils), and most resins, which can severely reduce its absorbency and stability.
Conflicts
- organic solvents
- resins
- acids
- sodium chloride (salt)
Safety
Safety Profile
The Cosmetic Ingredient Review (CIR) Expert Panel deems Polyacrylate-5, or Sodium Polyacrylate, safe for cosmetic use within concentrations ranging from 0.1% to 3%. Proper formulation ensures non-irritating properties by maintaining low levels of acrylic acid residues (below 300 PPM). It adheres to safety regulations established by bodies like the FDA and EU Cosmetics Regulation.
Your Skin
Skin Compatibility
Our Assessment
Verdict
Polyacrylate-5 is a valuable polymeric ingredient for enhancing product texture, stability, and delivering effective surface hydration across all skin types due to its super-absorbent and film-forming properties.
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References
Sources