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
China
