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Technical Data Sheet
N-Methyl-2-Pyrrolidone (NMP)


Chemical Synonym
  • 1-Methyl-2-pyrrolidone; N-Methylpyrrolidone; N-Methylpyrrolidinone; NMP; 1-Methyl-2-pyrrolidone
Applications
  • Electronics
  • Paints & coatings
  • Polymer & plastic
  • Process solvents
  • Solvents/stripping agents
  • Wire wrappers

Product Description

N-Methyl-2-Pyrrolidone (NMP) is a high boiling, polar aprotic, low viscosity liquid. NMP has a good solvency for a wide range of organic and inorganic compounds and it is miscible with water at all temperatures and has a high chemical and thermal stability. It is used as a solvent for engineering polymers and coating resins. Additionally, the polar nature and the low surface tension of NMP makes it an excellent cleaning medium and paint stripping solvent.

NMP is a powerful solvent with a low volatility used for a wide range of chemicals and finds its application among others in:

Petrochemical processing:
NMP is used as extraction medium in several industrial processes because of its affinity for unsaturated hydrocarbons and aromatics, for example butadiene recovery, BTX extraction, lube oil purification, ...

As illustration for the strong selectivity of NMP towards acetylene, the table below shows the solubility of acetylene in various solvents.

Solvent

K value
(1 atm ml gas/ ml solvent, at 20°C)

Boiling point

NMP

43

204°C

DMF

36

153°C

Aceton

17.5

56.5°C

BLO

17

204°C

Cyclohexanone

14

155°C

Electronics:
NMP is used as photoresist stripper, for defluxing, degreasing and cleaning.
NMP is a solvent for the production of FCCL, polyamide/polyimide wire enamels, epoxy and polyurethane coatings, ...

Pharmaceuticals:
NMP can be used as solvent, extraction medium, …

Industrial and household cleaning:
NMP is used for paint stripping, in graffiti removers, oven cleaners, in automotive and industrial cleaner formulations, ...

Agrochemicals:
NMP can be used as solvent during synthesis or as a formulation agent.



Typical Properties

PropertyTypical Value, Units
General
Molecular FormulaC5H9NO
Molecular Weight99.13 g/mol
Autoignition Temperature245 °C
Boiling Point204 °C
Density 
     @ 25°C1.03 g/cm3
Dielectric Constant 
     10 kHz @ 25°C32.2
Dipole moment 
     @ 20°C12.26 D (debye)
Evaporation Ratea360
Flash Point 
     Closed Cup91 °C
Free energy of formation 
     @ 25°C210.85 kJ/mol
Freezing Point-24.2 °C
Hansen solubility parameters @ 25°C 
     Dispersion17.6 (MPa)½
     Hydrogen Bonding7.0 (MPa)½
     Polar12.0 (MPa)½
     Total22.4 (MPa)½
Heat of Combustion3 023 kJ/mol
Heat of Vaporization 
     @ 20°C54.5 kJ/mol
Octanol-water partition coefficient, log Pow 
     @ 25°C-0.46
pH 
     100 g/l @ 20°C8.5-10
Refractive Index1.4700
Specific Heat 
     @ 20°C0.175 kJ/mol.K
Surface Tension 
     @ 25°C41 mN/m
Thermal Conductivity 
     @ 20°C180 mW/m.K
     @ 50°C179 mW/m.K
     @ 80°C177 mW/m.K
Vapor Density 
     (air = 1)3.42
Vapor Pressure 
     @ 20°C0.324 hPa
     @ 40°C1.357 hPa
     @ 80°C13.473 hPa
Viscosity 
     @ 25°C1.661 mPa·s
     @ 50°C1.0 mPa·s
     @ 80°C0.9 mPa·s
Water solubilityMiscible

aDIN 53170; ether=1



Compatibility and Solubility

Solubility of other solvents in NMP
NMP is completely miscible with water, alcohols, ethers, ketones, aromatic and chlorinated hydrocarbons, other aprotic solvents and vegetable oils. In the table below some examples of solvents miscible with NMP are shown:

Glycols

Substituted pyrrolidones

Dimethylformamide

Nitrobenzene

Toluene

Ethanolamines

Benzene

Glycerol

Xylene

Chlorobenzene

Tetrahydrofuran

Ethylene/propylene carbonate


Compatibility of polymeric materials with NMP

NMP is commonly used as performance solvent for different types of plastics, resins, waxes and different types of paint formulations. In the table below some solubility data of different polymeric materials are presented.

Polymer

Solubility

Polyethylene

Insoluble

Polypropylene

Insoluble

Poly(ethylene/vinylacetate)

Insoluble

Polyamide

Insoluble

Polysulfone

Soluble

Polycarbonate

Insoluble

Polyacetal

Insoluble

Polyphenylene oxide

Insoluble

Polyethylene terephthalate (PET)

Insoluble

Polystyrene (PS)

Soluble

Poly(styrene/acrylonitrile)

Soluble

Poly(styrene/maleic anhydride)

Soluble

Polymethyl methacrylate

Soluble

Polyacrylonitrile

Soluble

Cellulose Acetate

Soluble

Polyesters

Soluble

Poly(methyl methacrylate) (PMMA)

Soluble

Poly(vinyl acetate)

Soluble

Poly(vinyl chloride) (PVC)

Soluble



Packaging
  • Bulk
  • PE drums (222 kg net)
  • IBC containers (1035 kg net)


Comments
Properties reported here are typical of average lots. Eastman makes no representation that the material in any particular shipment will conform exactly to the values given.


Eastman and its marketing affiliates shall not be responsible for the use of this information, or of any product, method, or apparatus mentioned, and you must make your own determination of its suitability and completeness for your own use, for the protection of the environment, and for the health and safety of your employees and purchasers of your products. No warranty is made of the merchantability of fitness of any product, and nothing herein waives any of the Seller's conditions of sale.


3/14/2019 9:31:57 AM