Poly(ethylene glycol) is widely used in pharmaceuticals as a solvent, binder, and lubricant in tablet formulations. It helps in enhancing drug solubility and stability, making it a key component in various oral and topical medications. In the cosmetics industry, it acts as a moisturizer and thickener in creams, lotions, and shampoos, providing a smooth texture and improved skin hydration.

In biotechnology, it is utilized for protein purification and crystallization, as well as in cell fusion techniques. It is also employed in the production of medical devices, such as coatings for catheters and implants, to reduce friction and improve biocompatibility. Additionally, it serves as a base for many personal lubricants due to its water-soluble and non-irritating properties.

In industrial applications, poly(ethylene glycol) is used as a plasticizer, antifoaming agent, and in the manufacturing of adhesives, inks, and coatings. Its versatility and low toxicity make it a valuable material across various fields.