English name: N-methylpyrrolidin-2-one

English alias: N-methylpyrrolidin-2-one; N-methyl-6-oxo-1,6-dihydropyridine-3-carboxamide; 1-Methyl-2-pyrrolidinone; N-methyl-2-pyrrolidinone; 1,6-Dihydro-N-methyl-6-oxonicotinamide; N-methyl-2-pyridone-5-carboxamide; N-methyl pyrrolidin-2-one; 1-methylpyrrolidin-2-one; N-methyl pyrrolidinone; 1-methyl-2-oxo pyrrolidine; MPD; NMP

EINECS: 212-828-1

Appearance and properties: Colorless or light yellow liquid with an amine odor

Density: 1.028 g/mL at 25 ° C (lit.)

Melting point: 24 ° C (lit.)

Boiling point: 202 ° C (lit.)

Flash point: 187 ° F

Water solubility:>=10 g/100 mL at 20 ° C

Refractive index: n20/D 1.479

Steam density: 3.4 (vs air)

Storage conditions/methods: intact packaging, light loading and handling, ventilated warehouse, away from open flames, high temperatures, and stored separately from oxidants



Stability related:

1. Colorless liquid with an ammonia odor and low toxicity. It is miscible with water and soluble in most organic solvents such as ether and acetone. It can dissolve most organic and inorganic compounds, polar gases, natural and synthetic polymer compounds.

2. Chemical properties: relatively stable in neutral solutions. After 8 hours in a 4% sodium hydroxide solution, 50% to 70% undergo hydrolysis. Hydrolysis gradually occurs in concentrated hydrochloric acid to produce 4-methylaminobutyric acid CH3NH (CH2) 3COOH. Due to the reaction of carbonyl groups, ketals or thiopyrrolidone can be generated

3. In the presence of an alkali catalyst, it reacts with olefins and undergoes alkylation reaction at the third position. N-methylpyrrolidone is weakly alkaline and can generate hydrochloride salts. Forming adducts with heavy metal salts, such as heating nickel bromide to 150 ℃ to generate NiBr2 (C5H9ON) 3, with a melting point of 105 ℃.

【 Usage 1 】 Widely used for refining advanced lubricating oils, synthesizing polymers, insulating materials, pesticides, pigments, and cleaning agents, etc

【 Usage 2 】 It is an excellent solvent widely used as an extraction agent for aromatic hydrocarbon extraction, lubricating oil refining, acetylene concentration, synthesis gas desulfurization, and also for industrial cleaning

【 Usage 3 】 N-methylpyrrolidone is an excellent extraction solvent, widely used as an extractant in aromatic hydrocarbon extraction, acetylene concentration, butadiene separation, and desulfurization of synthetic gas. It is also a solvent in the production of pesticides, engineering plastics, coatings, synthetic fibers, integrated circuits, and other industries. It can also be used as industrial detergents, dispersants, dyeing agents, lubricating oil antifreeze, and so on. This product has low toxicity, with an oral LD50 of 7ml/kg in rats.