Tetraethylurea is primarily used as a solvent in various chemical reactions and processes. It is particularly effective in dissolving a wide range of organic compounds, making it useful in the synthesis of pharmaceuticals and other complex organic molecules. Additionally, it serves as a stabilizer in the production of polymers and resins, ensuring consistent quality and performance in the final products. Its high boiling point and thermal stability also make it suitable for use in high-temperature applications, such as in the formulation of heat-resistant coatings and materials. In research laboratories, tetraethylurea is often employed as a reagent in studies involving organic synthesis and material science.