PEG400DS is widely used as a surfactant and emulsifier in various industries, particularly in pharmaceuticals and cosmetics. In pharmaceutical formulations, it helps improve the solubility and stability of active ingredients, making it a key component in drug delivery systems such as tablets, capsules, and topical creams. Its emulsifying properties also make it valuable in creating stable emulsions for skincare products, lotions, and ointments. Additionally, PEG400DS is utilized in industrial applications as a lubricant and dispersing agent, aiding in the smooth processing of materials. Its versatility and compatibility with a range of substances make it a popular choice for enhancing product performance and consistency.