N-methylpyrrolidone is referred to as NMP, molecular formula: C5H9NO, English: 1-Methyl-2-pyrrolidinone, appearance is colorless to light yellow transparent liquid, slightly smell of ammonia, miscible with water in any proportion, soluble in ether, acetone And various organic solvents such as esters, halogenated hydrocarbons, aromatic hydrocarbons, etc., it is completely chemically mixed with almost all solvents, with a boiling point of 204°C and a flash point of 91°C. It has strong hygroscopicity and stable chemical properties. It does not corrode carbon steel and aluminum, and is non-corrosive to copper. Slightly corrosive. It has the advantages of low viscosity, good chemical and thermal stability, high polarity, low volatility, and unlimited miscibility with water and many organic solvents. This product is a micro-drug, and the allowable limit concentration in the air is 100PPM.

Physical and chemical properties N-methylpyrrolidone is a colorless to light yellow transparent liquid with a slight ammonia odor. It is miscible with water in any proportion and soluble in various organic solvents such as ether, acetone and esters, halogenated hydrocarbons, Chemicalbook aromatics, etc., almost Mix thoroughly with all solvents. It is relatively stable in neutral solution; it gradually hydrolyzes in concentrated hydrochloric acid to generate 4-methylaminobutyric acid.

Appearance Colorless transparent liquid (above 25℃)
Purity% ≥99.5
Moisture% ≤0.1
Chroma HaZen ≤25
Refractive index N20D 1.468-1.471
Density 1.032-1.035

Purpose N-methylpyrrolidone (NMP) is a polar aprotic solvent. It has low toxicity, high boiling point and excellent solubility. Advantages of strong selectivity and good stability. Widely used in aromatic hydrocarbon extraction, purification of acetylene, olefins and dienes, solvent for polyvinylidene fluoride, electrode auxiliary materials for lithium-ion batteries, syngas desulfurization, lubricating oil refining, lubricating oil antifreeze, Chemicalbook olefin extraction agent, Solvents for the polymerization of insoluble engineering plastics, agricultural herbicides, insulation materials, integrated circuit production, cleaning of precision instruments and circuit boards in the semiconductor industry, PVC exhaust gas recovery, cleaning agents, dye additives, dispersants, etc. It is also used as a solvent for polymers and a medium for polymerization reactions, such as engineering plastics and aramid fibers. In addition, it can also be used in pesticides, medicines and detergents, etc.