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. Additionally, it is employed in drug delivery systems, such as PEGylation, where it enhances the stability and circulation time of therapeutic proteins and peptides.

In the cosmetics industry, it serves as a moisturizer and thickener in various skincare and haircare products. Its ability to retain water makes it effective in hydrating the skin and hair. It is also used in toothpaste and mouthwashes as a humectant to maintain moisture.

In industrial applications, it acts as a plasticizer, antifoaming agent, and dispersant in the production of ceramics, paints, and coatings. It is also used in the manufacturing of polyurethane foams and as a lubricant in metalworking fluids.

In biotechnology, it is utilized in cell fusion and cryopreservation processes. It helps in stabilizing cell membranes during freezing and thawing, ensuring cell viability. Furthermore, it is employed in molecular biology techniques, such as DNA and protein purification, due to its ability to precipitate biomolecules.

In the food industry, it is used as an emulsifier, stabilizer, and thickener in various food products. It helps in improving texture and consistency, ensuring a uniform product. It is also approved for use in food packaging materials to enhance flexibility and durability.