1-Methyl-2-pyrrolidinone
SIGALD/M79603 - ReagentPlus®, 99%
Synonym: 1-
CAS Number: 872-50-4
Empirical Formula (Hill Notation): C5H9NO
Molecular Weight: 99.13
EC Number: 212-828-1
MDL Number: MFCD00003193
Linear Formula: C5H9NO
Product Type: Chemical
| assay | 99% |
| autoignition temp. | 518 °F |
| bp | 202 °C (lit.) |
| 81-82 °C/10 mmHg (lit.) | |
| color | APHA: ≤50 |
| density | 1.028 g/mL at 25 °C (lit.) |
| dilution | (for general lab use) |
| expl. lim. | 9.5 % |
| form | liquid |
| impurities | ≤0.1% water (Karl Fischer) |
| InChI | 1S/C5H9NO/c1-6-4-2-3-5(6) |
| InChI key | SECXISVLQFMRJM-UHFFFAOYSA |
| mp | −24 °C (lit.) |
| pH | 7.7-10.0 (20 °C, 100 g/L) |
| product line | ReagentPlus® |
| Quality Level | 100 ![]() |
| refractive index | n |
| SMILES string | CN1CCCC1=O |
| vapor density | 3.4 (vs air) |
| vapor pressure | 0.29 mmHg ( 20 °C) |
| 0.99 mmHg ( 40 °C) |
| Application: | Undergoes condensation reactions with arylthioacetamides and methyl salicylates. Versatile solvent for water miscible applications. |
| Legal Information: | ReagentPlus is a registered trademark of Merck KGaA, Darmstadt, Germany |
| Other Notes: | A Greener alternative is available for many NMP applications, Cyrene (807796 ) |
| Packaging: | 1, 6×1, 2.5, 4, 4×4 L in glass bottle |
| Packaging: | 18, 20 L in steel drum |
| Symbol | ![]() GHS07,GHS08 |
| Signal word | Danger |
| Hazard statements | H315 - H319 - H335 - H360FD |
| Precautionary statements | P202 - P261 - P264 - P302 + P352 - P305 + P351 + P338 - P308 + P313 |
| Hazard Codes | T |
| Risk Statements | 61-36/37/38 |
| Safety Statements | 53-45 |
| WGK Germany | WGK 1 |
| Flash Point(F) | 195.8 °F - Pensky-Martens c |
| Flash Point(C) | 91 °C - Pensky-Martens clos |
| Purity | 99% |
| bp | 202 °C (lit.); 81-82 °C/10 mmHg (lit.) |
| mp | −24 °C (lit.) |
| Density | 1.028 g/mL at 25 °C (lit.) |
| Refractive Index | n |
| UNSPSC | 12352005 |



