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Moumoujus

PHENOL/STYRENE/METHYLSTYRENE COPOLYMER.

Valuable CAS 77939-50-5 / DEPILATORY

This copolymer acts primarily as an epilating agent, effectively removing hair directly from the follicle. Beyond hair removal, it serves important roles in formulation as a viscosity enhancer, opacifying agent, and film former, contributing to product texture and appearance.

Summary

epilating agent viscosity increasing agent opacifying agent film former

Science

Mechanism of Action

The ingredient functions by directly removing hair from the follicle, making it suitable for depilatory applications. Its polymeric structure also enables it to increase the viscosity of formulations, impart an opaque quality for improved aesthetics, and form a protective film on the skin surface.

Research

Clinical Evidence

Low confidence
Effective range N/A
Optimal

N/A

Transparency

Dusting Analysis

Not commonly dusted

Information regarding dusting properties for this ingredient is not available in the provided research data.

The Formula

Formulation

Solubility
Oil
Optimal pH N/A
0 7 14

Stability

No specific stability notes or incompatibilities were identified in the research data.

Safety

Safety Profile

CIR Status
Safe as used
Max tested
36.5%
Sensitization risk Low

The Cosmetic Ingredient Review (CIR) Expert Panel concluded that Phenol/Styrene/Methylstyrene Copolymer, along with related styrene and vinyl-type styrene copolymers, is safe for use in cosmetics under current practices and concentrations. Due to its large molecular size, percutaneous absorption of the polymer is not anticipated, minimizing systemic exposure. While styrene monomer (a component) is classified as carcinogenic, the panel determined that any detectable levels of residual styrene in cosmetic products would be significantly below levels of concern. The maximum reported use concentration for related styrene copolymers in cosmetics was 36.5% (for polystyrene in skin cleansing products).

Your Skin

Skin Compatibility

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

Our Assessment

Verdict

Valuable

Phenol/Styrene/Methylstyrene Copolymer is a valuable multi-functional ingredient primarily recognized for its epilating capabilities and its utility as a film former and rheology modifier, deemed safe for use in cosmetic applications by the CIR Expert Panel.

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