Bis[2-(2-hydroxyethoxy)ethyl] ether, also known as diethylene glycol diethyl ether or diglyme, is a colorless, odorless liquid characterized by its chemical formula C8H18O4. This compound is primarily used as a solvent in various industrial applications, particularly in the fields of pharmaceuticals, coatings, and electronics. Its excellent solvency properties make it ideal for dissolving a wide range of substances, including resins and polymers. Additionally, bis[2-(2-hydroxyethoxy)ethyl] ether is employed in the extraction and purification processes in chemical manufacturing. Despite its utility, appropriate safety measures should be observed during handling due to potential health hazards.