N-methylpyrrolidone, referred to as NMP, CAS#872-50-4, molecular formula C5H9NO, molecular weight 99.13, colorless or light yellow liquid, its boiling point is 202 ℃ (normal pressure), flash point 95 ℃ (closed cup). It is an important strong polar chemical solvent, widely used in lithium ion batteries, polymer materials, chemical additives, pesticides, medicine and IC cleaning and other fields and industries.
Melting point ？24°C(lit.)
Boiling point 202°C(lit.)
Density 1.028g/mLat25°C(lit.)
Vapor density 3.4 (vsair)
Vapor pressure 0.29mmHg (20°C)
Refractive index n20/D1.479
Flash point 187°F
Storage conditions 2-8°C
Solubility ethanol: miscible 0.1ML/mL, clear, colorless (10%, v/v)
Liquid
Acidity coefficient (pKa)-0.41±0.20(Predicted)
Color≤20(APHA)
Odor Slight amine odor
PH value 8.5-10.0 (100g/l, H2O, 20℃)
Water solubility>=10g/100mLat20oC
Stability: Stable, but decomposes upon exposure to light. Combustible. Incompatible with strong oxidizing agents, strong acids, reducing agents, bases.