CAS 872-50-4: NMP (N-Methyl-2-pyrrolidone) (C5H9NO)
Identity
| CAS Number | 872-50-4 |
| Molecular Formula | C5H9NO |
| IUPAC Name | 1-methylpyrrolidin-2-one |
| Molecular Weight | 99.13 g/mol |
| SMILES | CN1CCCC1=O |
| Synonyms | N-methylpyrrolidone, 1-methyl-2-pyrrolidone, NMP |
2D Structure
Physical Properties
| Density | 1.028 g/mL at 25°C |
| Boiling Point | 202°C |
| Melting Point | -24°C |
| Flash Point | 91°C |
| Vapor Pressure | 0.04 kPa at 20°C |
| Refractive Index | nD = 1.47 |
| Dielectric Constant | ε = 32.2 |
Safety & GHS Classification
IrritantHealth Hazard
- H315: Causes skin irritation
- H319: Causes serious eye irritation
- H335: May cause respiratory irritation
- H360D: May damage the unborn child
Storage: Store in original container, tightly closed. Hygroscopic — protect from moisture. Use in well-ventilated area with local exhaust.
Material Compatibility Matrix
Plastics
| Material | Rating |
|---|
| PTFE | Excellent |
| PVC | Poor |
| PE | Good |
| PP | Good |
| PEEK | Excellent |
| PVDF | Good |
Rubbers
| Material | Rating |
|---|
| Viton | Poor |
| NBR | Poor |
| EPDM | Good |
| Silicone | Fair |
| FKM | Poor |
Metals
| Material | Rating |
|---|
| Stainless 316 | Excellent |
| Aluminum | Excellent |
| Copper | Excellent |
| Brass | Excellent |
Applications
- Industrial solvent for polymers and coatings
- Paint stripper
- Lithium-ion battery electrode manufacturing
- Semiconductor wafer cleaning
- Pharmaceutical extraction solvent
External References: PubChem
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