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METHYLSTYRENE/VINYLTOLUENE COPOLYMER.

Optional CAS 9017-27-0 / VISCOSITY CONTROLLING

Methylstyrene/Vinyltoluene Copolymer is a versatile polymer utilized in cosmetic formulations to create a protective film, modify viscosity, and provide opacifying effects. It also functions as a suspending and surfactant agent, contributing to product stability and texture.

Summary

Film-forming Viscosity increasing Opacifying Suspending agent Surfactant

Science

Mechanism of Action

Operating as a multi-functional ingredient, Methylstyrene/Vinyltoluene Copolymer enhances cosmetic formulations through several distinct mechanisms. It acts as a film former, creating a thin, often flexible layer on surfaces. As a viscosity increasing agent, it contributes to the desired rheology and texture of products. Its opacifying properties help reduce transparency, while its role as a suspending agent ensures even distribution of insoluble particles within a formula. Furthermore, it exhibits surfactant characteristics, aiding in the dispersion and emulsification of ingredients.

Research

Clinical Evidence

Low confidence
Effective range N/A
Optimal

N/A

Transparency

Dusting Analysis

Not commonly dusted

The Formula

Formulation

Solubility
Oil
Optimal pH N/A
0 7 14

Stability

For optimal stability, store in a tightly sealed container in a dry, well-ventilated environment, away from light and at a temperature of -20 °C. It is crucial to avoid exposure to heat, ignition sources, and the formation of dust.

Conflicts

  • General incompatible materials
  • Resin-forming constituents in solvents (during manufacturing to prevent discoloration)
  • Preformed polymers in reactants that are insoluble in aliphatic solvents

Safety

Safety Profile

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

The CIR Expert Panel concluded that Methylstyrene/Vinyltoluene Copolymer, as part of a group of styrene and vinyl-type styrene copolymers, is safe for use in cosmetics at concentrations up to 36.5%. This assessment is based on its large molecular size, which suggests negligible percutaneous absorption, and negative toxicity test results. However, it is important to note that Environment Canada has classified this ingredient as 'expected to be toxic or harmful' and a 'medium human health priority' for organ system toxicity (non-reproductive) in one assessment, indicating a divergence in regulatory hazard perception.

Your Skin

Skin Compatibility

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

Our Assessment

Verdict

Optional

This copolymer acts as a versatile functional ingredient, enhancing product texture and stability, yet its overall safety profile warrants cautious consideration due to conflicting regulatory assessments.

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