Science
Mechanism of Action
This copolymer primarily operates as a viscosity controlling agent, influencing the thickness and texture of cosmetic formulations. Analogous polymers demonstrate additional capabilities as film-forming agents, providing a protective layer on the skin, and as stabilizers for water-in-oil emulsions, preventing ingredient separation.
Research
Clinical Evidence
Low confidenceN/A
Transparency
Dusting Analysis
The Formula
Formulation
Stability
As an oil-soluble polymer, Isoprene/Pentadiene Copolymer is readily incorporated into organic solvent systems and exhibits limited solubility in water. Its structural properties allow it to stabilize water-in-oil emulsions and form films, which can enhance product wear and feel.
Safety
Safety Profile
The Cosmetic Ingredient Review (CIR) Expert Panel has deemed Isoprene/Pentadiene Copolymer safe for use in cosmetics under current practices of use. Comprehensive safety assessments of polyene ingredients, including this copolymer, indicate low systemic toxicity in animal studies, an absence of teratogenic, carcinogenic, or genotoxic effects, and no observed irritation or sensitization. While a specific maximum concentration for Isoprene/Pentadiene Copolymer is not strictly defined, related polyene ingredients have been observed in cosmetic formulations at concentrations as high as 95% in products such as lipsticks.
Your Skin
Skin Compatibility
Our Assessment
Verdict
Isoprene/Pentadiene Copolymer is a valuable formulation ingredient, safely enhancing product texture and stability as a viscosity controller, film-former, and emulsion stabilizer.
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