Peg21 is widely used in the cosmetics and personal care industry as an emulsifier and solvent. It helps to stabilize formulations, ensuring that oil and water-based ingredients blend smoothly without separating. This property makes it a key component in lotions, creams, and serums, where it enhances texture and improves product spreadability. Additionally, it acts as a humectant, helping to retain moisture in the skin, making it ideal for hydrating skincare products. Its mild and non-irritating nature also makes it suitable for sensitive skin formulations. Beyond skincare, it is used in haircare products to condition and soften hair while improving manageability.