1-Methyl-2-pyrrolidone
1-methyl-2-pyrrolidone, also known as NMP or n-Methylpyrrolidone, is an aprotic, highly polar organic solvent with a wide range of applications. The average consumer is most likely to encounter it in paint strippers, even though safer alternatives exist. NMP has been closely linked to developmental impacts including miscarriages. Contact may irritate skin eyes and mucous membranes. It is used as a solvent reagent and synthetic material.
- CAS #: 872-50-4
- SYNONYM: NMP; 1-Methylazacyclopentan-2-one; Methylpyrrolidone; N-Methylpyrrolidone; 2-Pyrrolidinone, 1-methyl-; N-methyl-2-pyrrolidone
- FORMULA: C5H9NO
- PRODUCT TYPE: Petrochemcial
- HAZARD: 3 Flammable Liquids
Description
NMP (N-Methyl-2-Pyrrolidone) is a polar solvent with outstanding characteristics. It has a wide range of applications because it offers very high solvency, high boiling point, low freezing point, and ease of handling.
CAS: No. 872-50-4 (T)
EINECS: No. 212-828-1
Characteristics
NMP is a 5-member-ring compound containing nitrogen. It has a wide range of uses due to the following excellent characteristics. n-Methyl-2-pyrrolidone (NMP) is a chemical compound with 5-membered lactam structure. It is a clear to slightly yellow liquid miscible with water and solvents like ethyl acetate, chloroform, benzene and lower alcohols or ketones.
- It is highly polar and miscible with most organic solvents (alcohols, ethers, ketones, aromatic hydrocarbons, chlorinated hydrocarbons, etc.). Organic and inorganic substances are highly soluble in it.
- It mixes with water in all proportions.
- It has a high flash point compared to similar solvents.
- The boiling point is high, the freezing point is low, and handling is easy.
- It is chemically and thermally stable, and not corrosive.
| Common Names | G N-Methyl-2-Pyrrolidone, 1-Methyl-2-Pyrrolidone, 1-Methyl-Pyrrolidine-2-one, N-Methyl-2-Pyrrolidinone |
|---|---|
| Structure |  |
| CAS No. | 872-50-4 |
| Japan Chemical Mfg. Reg. | 5-113 |
| Japan Poisonous and Deleterious Substances Control Law | Not applicable |
| Japan, Fire Services Law | Hazardous material Class 4 Petroleums No.3 water-soluble Hazardous Rank III |
| Molecular Weight | 99.14 |
| Appearance | Clear colorless liquid |
| Odor | Faint amine smell |
| Specific Gravity (25/4℃) | 1.027 |
| Viscosity(mPa･s) | 1.89（25℃） |
| Boiling Point (℃) | 202 |
| Freezing Point (℃) | -23 |
| Vapor specific gravity | 3.4 |
| Flash Point (℃) | 99 (open cup) |
| Autoignition Temperature (℃) | 252 |
Our Mizushima plant (Kurashiki-shi, Okayama-ken) produces high-purity, high-grade NMP from maleic anhydride in an integrated production process.
Applications
- NMP is used to produce fine chemicals from mass-produced chemicals.
- NMP applications in the electronics field have expanded in recent years. NMP’s high polarity and high solvency power along with our high purity, high-grade production technology enable the high performance needed in this field.
- NMP can dissolve organic and inorganic compounds equally well or better than chlorofluorocarbon solvents. Therefore NMP is used in various industrial fields as a cleaning or release agent.
- NMP is replacing 1,1,1-trichloroethane in metal cleaning applications due to the world-wide environmental pollution problems associated with chlorinated solvents.
- Peptide synthesis in the pharmaceutical industry
- Membrane manufacture, for example, polyvinylidene fluoride (PVDF), polyvinylpyrrolidone (PVP)
and polyether sulfone (PES). - Lithium ion battery production
- Coatings, inks and resins
- Crop protection formulations and active ingredient synthesis
- Oil extraction processes
1) Electronics
- Wax, flux removal
- Burr removal
- Electronic parts cleaning
- Semiconductor parts cleaning
- Solvent for lithium battery manufacturing
- Semiconductor photo-resist thinner
- Color filter photo-resist thinner
2) Automotive
- Mold cleaning
- Metal (parts) cleaning
3) Chemical
- Extract agent (acetylene, BTX, butadiene)
- Synthetic resin surface coating solvent
- Reaction solvents (PPS, polyimide, etc.)
- Equipment washing
4) Optical
- Plastic lens manufacturing equipment cleaning
5) Pharmaceutical and Agricultural Chemicals
- Water-soluble solvent
- Cleaning
- Extraction
Handling and Storage
NMP is classified under the Chinese Fire Services Act as a hazardous material, Class 4, Petroleums No.3 (4,000 liter quantity specified), water soluble, Hazardous Rank III.
Since NMP is hygroscopic, if moisture content is to be controlled, it is important to keep storage containers tightly closed or under a dry nitrogen atmosphere. Since NMP is a strong degreaser, in the event of skin contact wash immediately with water.
Specifications/Quantities
| Item | Specification |
|---|---|
| Hue (APHA) | <50 |
| Specific Gravity (20/4℃) | 1.027～1.030 |
| Purity (%) | >99.0 |
| Moisture (%) | <0.1 |
| Refractive index (ND25 ℃) | 1.465～1.470 |
| Distillation test (℃) initial boiling point |
>198 |
| Distillation test dry point (℃) |
<208 |
| Distillation test all distillate volume (vol%) |
>95 |
| Tanker Truckload (Lorry) | 10ton |
|---|---|
| Drum | 200kg |
| Oilcan | 18kg |
HSN Code : 29142990
IMDG Identification : Restricted for export from India
Molecular Formula : C5H9NO
Molecular Weight : 99.13
Storage : Room Temperature
Shelf Life : 60 Months
| Appearance (Clarity) | Clear |
| Appearance (Colour) | Colourless |
| Appearance (Form) | Liquid |
| Assay (GC) | min. 99.5% |
| Density (g/ml) @ 20°C | 1.029-1.031 |
| Refractive Index (20°C) | 1.470-1.471 |
| Boiling Range | 201-202°C |
| Non Volatile Matter | max. 0.0005% |
| Water (KF) | max. 0.05% |
| %T (Transmission) in a 1cm cell v/s H2O | |
| @285nm | ≥10 |
| @300nm | ≥30 |
| @325nm | ≥80 |
| @350nm | ≥94 |
| @400nm | ≥98 |
Application
1-Methyl-2-pyrrolidinone is in use and suitable for many kinds of prescription, etc. Its main applications are as follows:
1). Industrial Class: Lubricant refining; Electrical insulant; Pesticide accessory ingredient; High-class coating, printing ink, pigment, ect.
2). Fiber Class: Concentrate the acetylene; Extracte the butadiene, isoprene, aromatics, Polymerizing solvent for the engineering plastics which are difficult to dissolve(such as the polyphenylene sulfide and the polyimide) and the aromatic fiber;
3). Electric Class: Polymerizing lithium ion battery.
4). Reagent Class: deoil, defat, dewax, burnish, anti- rust and depainting,etc used in Integrated circuit profession and so on hard disk line, Requested strictly to control the metallic ion and Tiny dust particle; and The artifcial kidney function film liquid and the sea water desalination film liquid.
Packing and Storage
Packing: 200kgs plastic drum or 200L steel drum
Storage: Store in a tightly closed container. Store in a cool, dry and well ventilated place.
Specifications:
| Items | Micro-electronic Grade | Electronic Grade | Pharmaceutical Grade | Industrial Grade |
| Purity (GC, wt%)≥ | 99.90 | 99.90 | 99.80 | 99.50 |
| Water (K.F., wt%)≤ | 0.01 | 0.02 | 0.03 | 0.05 |
| Chroma (Hazen, APHA ≤ | 5 | 10 | 20 | 25 |
| Density (@200Cjg/ml) | 1.026-1.036 | 1.026-1.036 | 1.026-1.036 | 1.026-1.036 |
| Refractive index (@20) | 1.46-1.475 | 1.46-1.475 | 1.46-1.475 | 1.46-1.475 |
| PH value (20’C) 50% | 6.5-9.0 | 6.5-9.0 | 6.5-9.0 | 6.5-9.0 |
| Total amine (50%,ppm) ≤ | 10 | 20 | 30 | 50 |
| Heavy metal≤ | 10 | 20 | 50 | 100 |
Packing Types:
It is packaged with galvanized buckets (net weight: 200KG), paint coated buckets (net weight: 200KG), HDPE buckets (net weight:200KG), IBC buckets (net weight: 1,OOOKG), GB standard stainless steel ISOTANK (NW: 21MT).
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