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-toxic and non-irritating properties. It also serves as a stabilizer in protein and peptide-based drugs, preventing aggregation and degradation.

In biotechnology, it is employed in cell fusion techniques and as a precipitant in protein crystallization. It is also used in the production of biopharmaceuticals to enhance the stability of therapeutic proteins during storage and delivery. In the cosmetic industry, it acts as a moisturizer and thickening agent in lotions, creams, and shampoos, providing a smooth texture and enhancing product performance.

Additionally, it is applied in industrial processes as a plasticizer, dispersing agent, and lubricant in various manufacturing applications. In the food industry, it serves as a thickener and humectant. In the textile industry, it is used as a fiber coating to enhance softness and prevent static electricity. It is also employed in biomolecule separation processes, such as for proteins and DNA, due to its non-denaturing properties. In research, it is used as a cryoprotectant to preserve cells and tissues during freezing and in cell culture to provide a suitable environment. Its versatility and biocompatibility make it a valuable component across multiple industries.