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Moumoujus

POLYACRYLAMIDE.

Valuable CAS 9003-05-8 / ANTISTATIC, BINDING, FILM FORMING

Polyacrylamide is a synthetic polymer frequently employed in skincare for its multi-functional properties, primarily acting as a thickener, emulsifier, and film-forming agent. It establishes a breathable layer on the skin to enhance hydration, while also improving product texture and overall stability within formulations.

Summary

film forming thickening emulsifying hydration texture enhancer stabilizer

Science

Mechanism of Action

On the skin, Polyacrylamide establishes a lightweight, breathable film that effectively mitigates transepidermal water loss (TEWL), thereby bolstering skin hydration and moisture retention. This polymeric film also bestows a smooth and silken texture upon cosmetic formulations, facilitating improved spreadability and sensorial experience. Furthermore, it can contribute to a temporary skin-tightening effect, which may visually diminish the appearance of superficial lines. In formulation, it acts as a robust emulsifier, preventing phase separation and ensuring consistent product performance.

Research

Clinical Evidence

Low confidence
Effective range N/A
Optimal

N/A

Transparency

Dusting Analysis

Not commonly dusted

The Formula

Formulation

Solubility
Water
Optimal pH 5 – 6
0 7 14

Stability

Polyacrylamide is a highly water-absorbent polymer, with optimal emulsion stability observed at pH levels below 6, ideally around 5.5. Anionic polyacrylamide, a common form, maintains effectiveness across a broader pH range of 5 to 14. Formulations should be stored between 5°C and 30°C, protected from water contamination and conditions that promote surface drying. Minimal shearing during handling (e.g., pumping, filtering, stirring) is recommended, as elevated temperatures in aqueous media can lead to partial hydrolysis and altered hydrophilicity.

Safety

Safety Profile

CIR Status
Safe with restrictions
Max tested
3%
Sensitization risk Low

The Cosmetic Ingredient Review (CIR) Expert Panel has deemed Polyacrylamide safe for cosmetic use, provided the acrylamide monomer impurity does not exceed 5 ppm. Polyacrylamide itself is generally considered non-irritating and non-sensitizing, with human cutaneous tolerance tests showing good acceptance at 5%. However, residual acrylamide monomer is a concern due to documented neurotoxic effects and carcinogenicity in animal studies, leading to strict regulatory limits by the European Union and the FDA. The maximum reported concentration in cosmetic formulations as of 2022 was 3%.

Your Skin

Skin Compatibility

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

Our Assessment

Verdict

Valuable

Polyacrylamide is a valuable ingredient primarily for its robust emulsion stabilizing, thickening, and film-forming capabilities, which enhance skin hydration and product texture, provided stringent controls on acrylamide monomer impurities are met.

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