PEG-8, or Polyethylene Glycol 8, is a synthetic polymer made from ethylene oxide. It is a water-soluble, colorless, and odorless liquid or solid, depending on its molecular weight. In cosmetic formulations, PEG-8 is primarily used as an emulsifier, humectant, and solubilizer.As an emulsifier, PEG-8 helps to mix oil and water-based ingredients, creating a stable and smooth product. This is particularly useful in creams, lotions, and makeup products. As a humectant, PEG-8 attracts and retains moisture, helping to keep the skin hydrated and maintaining the product's consistency. As a solubilizer, PEG-8 helps to dissolve and disperse other ingredients, such as fragrances or active ingredients, throughout the product.Overall, PEG-8 is a versatile ingredient that improves the texture, stability, and performance of various cosmetic products, including skincare, haircare, and makeup products.