Product Details
N-Methyl-2-pyrrolidone CAS#872-50-4
N-Methyl-2-pyrrolidone is an aprotic solvent widely used across many industries including petrochemical processing, surface coating, dyes and pigments, industrial and household cleaning products, as well as agricultural and pharmaceutical preparations. While it is primarily an irritant, it has also been linked to multiple cases of contact dermatitis in a small electrical manufacturing company.
Parameters
| Item | Value |
| Melting point | -24 °C (lit.) |
| Boiling point | 202 °C (lit.) 81-82 °C/10 mmHg (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 |
| Fp | 187 °F |
| storage temp. | Store at +5°C to +30°C. |
| solubility | ethanol: miscible0.1ML/mL, clear, colorless (10%, v/v) |
| pka | -0.41±0.20(Predicted) |
| form | Liquid |
| color | ≤20(APHA) |
| Odor | Slight amine odor |
| PH | 8.5-10.0 (100g/l, H2O, 20℃) |
| PH Range | 7.7 - 8.0 |
| explosive limit | 1.3-9.5%(V) |
| Water Solubility | >=10 g/100 mL at 20 ºC |
| λmax | 283nm(MeOH)(lit.) |
| Sensitive | Hygroscopic |
| Merck | 14,6117 |
| BRN | 106420 |
| Dielectric constant | 32.200000000000003 |
| Stability: | Stable, but decomposes upon exposure to light. Combustible. Incompatible with strong oxidizing agents, strong acids, reducing agents, bases. |
| Major Application | food and beverages |
| Cosmetics Ingredients Functions | SOLVENT |
| InChI | 1S/C5H9NO/c1-6-4-2-3-5(6)7/h2-4H2,1H3 |
| InChIKey | SECXISVLQFMRJM-UHFFFAOYSA-N |
| SMILES | CN1CCCC1=O |
| LogP | -0.46 at 25℃ |
| Surface tension | 41.3mN/m at 293.15K |
| CAS DataBase Reference | 872-50-4(CAS DataBase Reference) |
| NIST Chemistry Reference | 2-Pyrrolidinone, 1-methyl-(872-50-4) |
| EPA Substance Registry System | N-Methyl-2-pyrrolidone (872-50-4) |
Safety Information
| Item | Value |
| Hazard Codes | T,Xi |
| Risk Statements | 45-65-36/38-36/37/38-61-10-46 |
| Safety Statements | 41-45-53-62-26 |
| RIDADR | NA1993 |
| WGK Germany | 1 |
| RTECS | UY5790000 |
| F | 3-8-10 |
| Autoignition Temperature | 518 °F |
| TSCA | TSCA listed |
| HazardClass | CBL |
| HS Code | 2933199090 |
| Storage Class | 6.1C - Combustible acute toxic Cat.3 toxic compounds or compounds which causing chronic effects |
| Hazard Classifications | Eye Irrit. 2 Repr. 1B Skin Irrit. 2 STOT SE 3 |
| Hazardous Substances Data | 872-50-4(Hazardous Substances Data) |
| Toxicity | LD50 orally in Rabbit: 3598 mg/kg LD50 dermal Rabbit 8000 mg/kg |
Product Application
N-Methyl-2-pyrrolidone is a polar solvent applied in organic synthesis and polymer chemistry. Its large‑scale industrial uses include recovery and purification of acetylenes, olefins, and diolefins, gas purification, and aromatics extraction from raw materials. As a flexible industrial solvent, NMP is currently authorized only for veterinary pharmaceutical applications. Studies on its distribution and metabolism in rats help clarify the toxicological profile of this chemical, to which human exposure is expected to rise.
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