Poly(ethylene glycol) is widely used in pharmaceuticals as a solvent, binder, and lubricant in tablet formulations. It helps in improving the solubility and bioavailability of poorly soluble drugs. In the medical field, it is utilized as a base for ointments, creams, and suppositories due to its non-irritating and moisturizing properties. Additionally, it serves as a crucial component in laxatives and bowel preparation products.

In the cosmetics industry, it acts as a thickener, softener, and moisture carrier in various skincare and haircare products. Its ability to retain water makes it effective in hydrating formulations. In biotechnology, it is employed in protein purification and crystallization processes, as well as in cell fusion techniques.

Poly(ethylene glycol) is also used in industrial applications, such as a lubricant and antifoaming agent. It plays a role in the production of polymers, plastics, and adhesives, enhancing their flexibility and durability. Furthermore, it is utilized in wastewater treatment as a flocculant to aid in the removal of suspended particles.