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Moumoujus

SODIUM POLYSTYRENE SULFONATE.

Valuable CAS 9080-79-9 / 62744-35-8 / EMULSION STABILISING, FILM FORMING, GEL FORMING, SURFACTANT - CLEANSING, VISCOSITY CONTROLLING

Sodium Polystyrene Sulfonate is a synthetic polymer primarily utilized in skincare for its texture-enhancing and film-forming properties. It imparts a smoother feel to formulations and can create a perceptible tightening sensation on the skin. Beyond texture, it contributes to product stability and viscosity control.

Summary

emulsion stabilising film forming gel forming surfactant viscosity controlling texture control hydration stabilization

Science

Mechanism of Action

This synthetic polymer resin functions mainly for texture control, creating a smoother skin feel and a transient 'tight' sensation post-application. Its capabilities extend to forming a film on the skin, binding and retaining water for hydration, emulsifying to produce consistent product textures, and stabilizing formulations by preventing ingredient separation. It also acts as a gel-forming agent, surfactant, and viscosity regulator.

Research

Clinical Evidence

Low confidence
Effective range N/A
Optimal

N/A

Key findings

  1. 01 In a study, a 5% T-PSS gel demonstrated significant protective effects against vaginal herpes in 15 out of 16 mice, compared to 2 out of 16 mice in the placebo group. It also showed in vitro effectiveness against herpes simplex viruses, Neisseria gonorrhoeae, and Chlamydia trachomatis, with low cytotoxicity.

Transparency

Dusting Analysis

Not commonly dusted

No specific data regarding dusting potential for Sodium Polystyrene Sulfonate was found in the provided research, indicating it is not a commonly 'dusted' ingredient in the context of its reported skincare functions.

The Formula

Formulation

Solubility
Water
Optimal pH N/A
0 7 14

Stability

While described as practically insoluble, Sodium Polystyrene Sulfonate is effectively utilized in aqueous cosmetic formulations through dispersion or swelling. For optimal stability in a medical context, the resin powder should be stored at 25°C (77°F), with a permissible range of 15-30°C (59-86°F). Suspensions should be used within 24 hours.

Conflicts

  • Due to its cation-exchange properties, Sodium Polystyrene Sulfonate may bind with and reduce the efficacy of other cationic ingredients, including minerals such as potassium, calcium, and magnesium. This interaction is primarily noted in its pharmaceutical application but suggests potential formulation considerations for skincare products containing such cations.

Safety

Safety Profile

CIR Status
Safe as used
Sensitization risk Low

The Cosmetic Ingredient Review (CIR) Expert Panel has deemed Sodium Polystyrene Sulfonate, as part of styrene and vinyl-type styrene copolymers, safe for cosmetic use within current concentration patterns. Its high molecular weight generally limits systemic absorption through the skin. While considered safe overall, its synthetic nature may rarely induce skin irritation or allergic reactions in sensitive individuals, though the overall risk is low. It is approved for cosmetic use and regulated by the US FDA.

Your Skin

Skin Compatibility

No Normal
Yes Dry
No Oily
No Sensitive
Irritancy Low
Comedogenicity Unknown

Our Assessment

Verdict

Valuable

Sodium Polystyrene Sulfonate is a valuable formulating agent for enhancing texture, feel, and stability in a wide array of skincare products, with a favorable safety profile.

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