Science
Mechanism of Action
It creates a continuous film on the skin, enhancing product longevity and feel. Additionally, it acts as an effective oil gelling agent, precisely controlling the viscosity of oil-based cosmetic formulations to optimize texture and spreadability.
Research
Clinical Evidence
Insufficient-data confidenceN/A
Transparency
Dusting Analysis
As a polymer primarily utilized for gelling and film-forming, this ingredient is not typically associated with dusting in cosmetic formulations.
The Formula
Formulation
Stability
This ingredient exhibits robust stability and heat tolerance, readily dissolving in oil when heated to temperatures between 100 and 110 degrees Celsius.
Conflicts
- strong oxidants (risk of combustion)
Safety
Safety Profile
The Cosmetic Ingredient Review (CIR) Expert Panel concluded this polymer is safe for cosmetic use under current practices. Its substantial molecular size significantly limits percutaneous absorption. While component monomers like styrene are noted carcinogens, residual levels in cosmetic products are considered to be substantially below levels of concern. Related mixtures have demonstrated minimal and reversible eye irritation.
Your Skin
Skin Compatibility
Our Assessment
Verdict
Hydrogenated Styrene/Methylstyrene/Indene Copolymer is a valuable formulation enhancer, safely providing essential film-forming and viscosity control properties for a wide array of cosmetic products.
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