Poly(ethylene glycol) is widely used in pharmaceuticals as a solvent, binder, and lubricant in tablet formulations. It helps improve drug solubility and bioavailability, making it essential in drug delivery systems. In the cosmetics industry, it acts as a moisturizer and thickener in lotions, creams, and ointments, providing smooth texture and hydration.

In biotechnology, it is utilized for protein purification and crystallization due to its ability to stabilize proteins and enhance solubility. It also plays a role in cell fusion techniques, aiding in the creation of hybridomas for monoclonal antibody production.

Additionally, poly(ethylene glycol) is employed in industrial applications as a surfactant, dispersing agent, and antifoaming agent in various processes. Its biocompatibility and water solubility make it a versatile material in medical devices, such as hydrogels for wound care and coatings for implants.

In research, it serves as a cryoprotectant for preserving biological samples during freezing, ensuring cell integrity. Its adaptability across industries highlights its importance in diverse applications.