N-Ethyl-2-pyrrolidone, a polar aprotic solvent, is a colorless and transparent liquid at room temperature. It has low volatility, high solubility, and good chemical stability. It is miscible with water and most organic solvents and can dissolve various substances such as resins, polymers, and pesticide active ingredients. It is widely used in fields such as electronics (photoresists, cleaning agents), chemical industry (polymerization reaction solvents, coating thinners), and pharmaceuticals and pesticides (solvents/co-solvents).