N-Methyl-2-pyrrolidone (NMP)
C₅H₉NO · CAS 872-50-4
Electronic grade NMP serves three major high-growth markets: lithium-ion battery NMC/LFP cathode electrode slurry (PVDF binder dissolution); semiconductor thick-film photoresist stripping and polyimide precursor coating in HDI and advanced packaging; and gas separation membrane manufacturing.
Molecular Weight
99.13 g/mol
Boiling Point
202 °C
Density
1.028 g/mL
Molecular Formula
Available Grades
Analytical Specification
Analytical Specification Table
All values represent maximum allowable limits unless noted ≥. A lot-specific Certificate of Analysis (CoA) with ICP-MS, LPC, and GC data is issued for every shipment. Full data packages available on request.
| Parameter | Test Method | Unit | G4 | G5 ★ | AR |
|---|---|---|---|---|---|
| Assay (GC) | GC-FID | % | ≥99.99 | ≥99.999 | ≥99.5 |
| Water Content (KF) | Karl Fischer | ppm | ≤50 | ≤20 | ≤1000 |
| Total Metals (ICP-MS) | ICP-MS | ppb ea. | ≤0.5 | <0.1 | — |
| Fe (Iron) | ICP-MS | ppb | ≤0.2 | <0.05 | — |
| Ni (Nickel) | ICP-MS | ppb | ≤0.2 | <0.05 | — |
| NMP Amine (by-product) | Titration | ppm | ≤50 | ≤20 | ≤200 |
| Color (APHA) | ASTM D1209 | Hazen | ≤10 | ≤5 | ≤15 |
| Residue on Evaporation | Gravimetric | ppm | ≤5 | ≤2 | ≤10 |
★ G5 = SEMI C1 Tier D (6N grade). All metal values by ICP-MS. Particle counts by in-line LPC during ISO Class 3 fill. CoA available on request.
Grade Comparison
G1 → G5 Purity Scale
Select the grade that matches your process node and contamination budget. Every grade is available from PureTech with full lot CoA and ICP-MS data.
All grades tested by ICP-MS (28 elements), in-line LPC (ISO Class 3 fill), and Karl Fischer titration. G5 = SEMI C1 Tier D. Full CoA per lot. Request CoA template →
Application Areas
Where N-Methyl-2-pyrrolidone Is Used
Semiconductor Process
- Thick-film positive photoresist stripping (3–50 μm)
- Polyimide (PI) precursor coating — HDI, flex PCB, RDL
- BCB (benzocyclobutene) planarization dielectric solvent
- Advanced packaging RDL dielectric (FOWLP, 2.5D)
- Cu TSV electroplating pre-treatment & post-clean
- LCD alignment layer coating (PI alignment film)
Laboratory & Analytical
- PVDF dissolution & polymer processing
- peptide bond chemistry
- electrochemical stability window measurement
Industrial & Other
- EV battery gigafactory electrode coating
- hollow fiber gas separation membrane
- wire enamel insulation
- LCD PI alignment film production
Battery & Energy Storage
Packaging & Supply
Available Container Formats
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