N,N-Diethylformamide is primarily used as a solvent in various chemical reactions and industrial processes. It is particularly effective in dissolving polymers, resins, and other organic compounds, making it valuable in the production of plastics, fibers, and coatings. In the pharmaceutical industry, it serves as a reaction medium for synthesizing active pharmaceutical ingredients (APIs) due to its ability to stabilize intermediates and facilitate reactions. Additionally, it is employed in the manufacturing of agrochemicals, where it acts as a solvent for pesticides and herbicides. Its high boiling point and solvency properties also make it useful in the purification and separation processes of certain chemicals.