Science
Mechanism of Action
This ingredient primarily functions as a viscosity controller, contributing to the desired texture and consistency of cosmetic products. Its polyethylene glycol (PEG) component is recognized for its emollient and humectant properties, aiding in moisture retention, alleviating dryness, and supporting barrier function. PEGs also offer versatility as emulsifiers, surfactants, and solvents. The propylene glycol constituent further improves product freeze-thaw stability, acts as an additional humectant, and enhances the solubility and skin penetration of other cosmetic ingredients.
Research
Clinical Evidence
Low confidenceN/A
Transparency
Dusting Analysis
The Formula
Formulation
Stability
The propylene glycol component is known to enhance the freeze-thaw stability of product formulations. While general PEGs exhibit stability within a pH range of 5-7, specific optimal pH stability for this ingredient is not explicitly detailed.
Conflicts
- Halogenated hydrocarbons (if polypropylene component is significant)
- Aromatic hydrocarbons (if polypropylene component is significant)
- Strong oxidizing acids (if polypropylene component is significant)
- Avoid on broken or damaged skin due to potential for increased absorption and irritation, especially for PEGs and Propylene Glycol components
Safety
Safety Profile
The Cosmetic Ingredient Review (CIR) Expert Panel concluded that PEG propylene glycol derivatives, which include this ingredient, are 'safe as used' in cosmetics. However, general PEGs can rarely cause allergic reactions such as contact dermatitis and anaphylaxis, particularly at higher concentrations or when applied to compromised skin. Propylene glycol, a component, has been linked to irritant and allergic contact dermatitis and contact urticaria, with sensitization potentially observed at concentrations as low as 2%. It is strongly advised against using products containing this ingredient on open wounds or extensive areas of broken skin without prior consultation with a medical professional. PEGs can also act as penetration enhancers, increasing skin permeability. Depending on manufacturing processes, PEGs may be contaminated with ethylene oxide (a known human carcinogen) and 1,4-dioxane (a possible human carcinogen).
Your Skin
Skin Compatibility
Our Assessment
Verdict
This versatile ingredient offers multiple formulation benefits and is generally deemed safe for cosmetic use; however, its potential for irritation and enhanced absorption on compromised skin warrants careful consideration, especially for individuals with sensitive skin.
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