N-methylpyrrolidone (NMP, CAS 872-50-4) is an organic substance with the chemical formula of C5H9NO. It is a colorless to light yellow transparent liquid with a slight smell of ammonia. It is miscible with water in any proportion, soluble in ether, acetone, esters, halohydrocarbons, aromatic hydrocarbons and other organic solvents, and almost completely mixed with all solvents.
Physical property data
1. Character: colorless transparent oily liquid with slight smell of amine.
2. Density: 1.028g/cm3
3. Melting point: - 24 ℃
4. Boiling point: 202 ℃
5. Refractive index: 1.470
6 Viscosity: 1.65mPa · s
7. Flash point: 86.1 ℃
8. Ignition point: 346 ℃
9. Combustion heat: 3010kJ/mol
10. Critical temperature: 445 ℃
11. Critical pressure: 4.76MPa
12. Conductivity: (1-2) × 10-8s/m
13. Solubility: easily soluble in water, ethanol, ether, acetone, ethyl acetate, chloroform and benzene, and soluble in most organic and inorganic compounds, polar gases, natural and synthetic polymer compounds.
Specification of N-Methylpyrrolidone NMP
| Item | Reagent grade | Electronic grade | Industrial grade |
| Assay, %min. | 99.9 | 99.9 | 99.5 |
| Color, Hazan max. | 15 | 20 | 25 |
| Density, g/ml | 1.032-1.035 | 1.032-1.035 | 1.032-1.035 |
| Water, % max. | 0.01 | 0.02 |
* Please refer to Certificate of Analysis for specific date.
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