Chinese name: N-methylpyrrolidone

English name: N-Methyl-2-pyrrolidone

CAS: 872-50-4

EINECS number: 212-828-1

Molecular formula: C5H9NO

MDL number: MFCD00003193

Molecular weight: 99.13

Appearance: Colorless transparent oily liquid, slightly amine odor. It can be miscible with water, alcohol, ether, ester, ketone, halogenated hydrocarbon and aromatic hydrocarbon.

Solubility: It can be miscible with water, alcohol, ether, ester, ketone, halogenated hydrocarbon and aromatic hydrocarbon.

Melting point: ?24 °C(lit.)

Boiling point: 202 °C(lit.)

Density: 1.028 g/mL at 25 °C(lit.)

Vapor density: 3.4 (vs air)

Vapor pressure: 0.29 mm Hg (20 °C)

Refractive index: n20/D 1.479

Flash point: 187 °F

Storage conditions: 2-8°C

Solubility: miscible ethanol, solubility is 0.1ML/mL, transparent, colorless (10%,v/v)

Predicted Acidity coefficient (pKa) : -0.41±0.20

Form: Liquid

Color: ≤20(APHA)

PH value: 8.5-10.0 (100g/l, H2O, 20℃)

Odor: Slightly amine odor

Acid-base indicator color change ph range: 7.7-8.0

explosive limit: 1.3-9.5%(V)

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

Sensitivity: hygroscopicity

Maximum wavelength (λmax) : 283nm(MeOH)(lit.)

Merck: 14,6117

Detection method: GC

BRN: 106420

Dielectric constant: 32.200000000000003

Stability: stable, but decomposed in light. Incompatible with strong oxidants, strong acids, reducing agents and bases.

InChIKey: SECXISVLQFMRJM-UHFFFAOYSA-N

LogP: -0.46 at 25℃

use

It is an excellent solvent, widely used as an extraction agent for aromatics extraction, lubricating oil refining, acetylene concentration, syngas desulfurization, etc., and also used in industrial cleaning