Poly(ethylene glycol) is widely used in pharmaceuticals as a solvent, binder, and lubricant in tablet formulations. It helps to control the release of active ingredients, ensuring a steady and prolonged effect. In the medical field, it is a key component in ointments, creams, and suppositories due to its moisturizing and stabilizing properties. It is also employed in bioconjugation to modify proteins and peptides, enhancing their stability and solubility.

In industrial applications, it serves as a surfactant, dispersant, and emulsifier in products like paints, coatings, and detergents. Its ability to retain moisture makes it valuable in the production of adhesives and sealants. Additionally, it is used in the manufacturing of flexible foams and as a plasticizer to improve the flexibility of polymers.

In biotechnology, it plays a crucial role in cell fusion and cryopreservation, protecting cells from damage during freezing and thawing processes. It is also utilized in drug delivery systems, such as hydrogels and nanoparticles, to improve the bioavailability and targeting of therapeutic agents. Its versatility and biocompatibility make it a vital component across various industries.