Nmethyl2pyrrolidone

N-methyl-2-pyrrolidone, commonly abbreviated NMP, is a polar aprotic solvent belonging to the lactam family. Its chemical formula is C5H9NO, and its IUPAC name is N-methyl-2-pyrrolidinone. In the molecule, a five-membered lactam ring bears a methyl group on the nitrogen atom. NMP is colorless and typically forms a hygroscopic liquid with a relatively high boiling point.

NMP is valued as a versatile solvent because it dissolves a wide range of polymers, resins, and active pharmaceutical ingredients while remaining miscible with water and many organic solvents. Applications include coatings, adhesives, electronic materials, polymer processing, and lithium-ion battery electrolytes. Its high polarity and thermal stability enable use in processes requiring high solvency and elevated temperatures.

Safety and handling: NMP can cause skin and eye irritation, and prolonged or repeated exposure may have adverse health effects. Handling requires appropriate protective equipment, adequate ventilation, and storage in a tightly closed container away from incompatibles. Regulatory status varies by jurisdiction; some agencies note reproductive or developmental concerns and restrict or regulate NMP use in certain consumer products or industrial settings.