Pareth-23 is a synthetic polymer used primarily as a surfactant and emulsifier in cosmetic and personal care products. It helps to stabilize formulations by allowing oil and water to mix effectively, enhancing texture and consistency. Additionally, Pareth-23 can improve the spreadability of products on the skin or hair, making it a common ingredient in lotions, shampoos, and other formulations. As with many synthetic compounds, safety assessments are conducted to ensure its suitability for use in consumer products.