Science
Mechanism of Action
This copolymer functions primarily by creating a resilient, protective film upon application to the skin or hair. This film acts as a physical barrier, significantly reducing transepidermal water loss (TEWL) and thereby supporting enhanced skin hydration. Beyond its film-forming capabilities, it serves as a thickening agent, increasing the viscosity of cosmetic formulations to achieve desirable textures and improve overall product stability. In surfactant-based systems, it also provides opacifying properties, reducing product transparency. The film-forming mechanism may additionally facilitate the controlled release of other active ingredients into the skin.
Research
Clinical Evidence
Low confidenceN/A
Transparency
Dusting Analysis
The Formula
Formulation
Stability
SODIUM STYRENE/ACRYLATES COPOLYMER is typically well-suited for anionic surfactant-based systems and performs optimally within a slightly acidic to moderate pH range. It demonstrates compatibility with a broad spectrum of solvents and oils, though its solubility can exhibit variability based on the specific formulation and concentration.
Conflicts
- High levels of inorganic electrolytes
Safety
Safety Profile
The Cosmetic Ingredient Review (CIR) Expert Panel has deemed styrene and vinyl-type styrene copolymers, including Sodium Styrene/Acrylates Copolymer, safe for cosmetic use under current practices, citing low percutaneous absorption due to large molecular sizes and negative toxicity test results. It is considered safe when formulated appropriately to prevent irritation. However, a critical distinction exists for the *nano* form: the Scientific Committee on Consumer Safety (SCCS) could not definitively conclude on its safety in leave-on products at concentrations up to 0.06% due to insufficient data for toxicity evaluation. Concerns regarding potential residual styrene, a possible carcinogen, are addressed by ensuring use of compliant grades with minimized levels. This ingredient is regulated in Europe.
Your Skin
Skin Compatibility
Our Assessment
Verdict
Sodium Styrene/Acrylates Copolymer is a valuable multifunctional ingredient, recognized by CIR as safe for general use, enhancing skin hydration and product aesthetics through its film-forming and viscosity-controlling properties, though caution is advised for its nano form due to limited safety data.
Related
Similar Ingredients
Finding similar ingredients…