1-Methyl-2-pyrrolidinone
SIAL/328634 - anhydrous, 99.5%
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 | 99.5% |
autoignition temp. | 518 °F |
bp | 202 °C (lit.) |
81-82 °C/10 mmHg (lit.) | |
density | 1.028 g/mL at 25 °C (lit.) |
expl. lim. | 9.5 % |
form | liquid |
grade | anhydrous |
impurities | <0.005% water |
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) |
Quality Level | 200 ![]() |
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: | 1-Methyl-2-pyrrolidinone may be used as a solvent in the following processes: • Preparation of 2-aryl and 2-alkyl benzothiazoles. • Ullmann coupling reaction of aryl halides and phenols to form Ullmann ethers in the presence of 2,2,6,6-tetramethylheptan • Stille cross-coupling reaction of aryl iodides with organostannanes catalyzed by Pd/C in the presence of copper iodide as cocatalyst. |
Legal Information: | Pure-Pac is a registered trademark of Sigma-Aldrich Co. LLC |
Other Notes: | Pure-Pac® II containers require the Micromatic MacroValve coupler for dispensing solvents, Z560723. |
Packaging: | 1, 6×1, 2, 4×2 L in Sure/Seal™ |
Packaging: | 100, 12×100 mL in Sure/Seal™ |
Packaging: | 18 L in Pure-Pac™ 1 |
Packaging: | 50 L in Pure-Pac™ 2 |
Packaging: | View returnable container options ![]() |
Symbol | ![]() ![]() |
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 | 99.5% |
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 |