N-methyl 2 pyrrolidone M-Pyrol™ solvent

M-Pyrol solvent, a lower alkyl pyrrolidone, is an extremely powerful and versatile aprotic solvent. With its high boiling point, low vapor pressure and high stability, it is an effective solvent in numerous industry applications and can be used as a co-solvent with water, alcohols and other organic substances.

M-Pyrol solvent is extremely resistant to hydrolysis from pH 2-10, even at elevated temperatures. Beyond these limits, hydrolysis to 

4-(methylamino) butanoic acid occurs at a rate dependent on pH and temperature.

A large body of chemistry has been developed on the reactions of strong nucleophiles with M-Pyrol solvent. High-purity, low amine and low trace-metal grades are sold under the Micropure™ tradename for the electronics industry and Pharmasolve™  trademane for the pharmaceutical industry.

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Welding co-solvent for PVC pipes, polycarbonates, polystyrene, acetates and other thermoplastics. Solution solvent for adhesives and cements


Solvent for agricultural formulations and synthesis applications such as insecticides, fungicides and herbicides.


Formulations for cleaning metal parts, electronic and computer components, automobile and appliance paint-spray booths, aircraft equipment, rubber and plastic parts, machinery, plastic molds, chemical and polymerization reactors, household varnish and paint removers, spot cleaners and household, industrial and institutional cleaners.


Stripper of epoxy flash from polymer-encapsulated components and circuitry. Cleaner for silicon wafers. Soldering flux residue remover in circuitry. Negative and positive photoresist and conformal coating remover. Replacement of corrosive mineral acids such as sulfuric acid to remove certain types of cured photo-resist. Solvent for electrolytes in electrolytic capacitors and lithium ion batteries. Solvent for polyvinylidene fluoride for lithium polymer batteries.


Solvent for resins and dyes, and pigment dispersant in inks and coatings. In combination with glycol ethers, silkscreen cleaner without damaging the photo-polymers used to define the image. Replacement for chlorinated hydrocarbons in cleaning formulations for toner removal from reprographic and copier equipment.


Solvent for polyethersulfone (PES) and polyvinylpyrrolidone (PVP) for preparation of ultrafiltration membranes.

Paint and Coatings

Solvent used in paint strippers to replace methylene chloride, acetone,
methanol, toluene, etc. Solvent for urethanes and epoxies in water-based coatings. Viscosity reduction agent in high-solid coatings. Coalescing agent in latexes. Insulating diluent used in wire enameling.


Extraction solvent for extraction of alphatic/aromatic hydrocarbons, gases, lube oils, coal and tar.


Reaction solvent in pharmaceutical active preparations.


Reaction medium for polyaramid and polyester fibers. Spinning solvent and clean-up solvent for PVC and PU.

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Product Literature (publicly available)
Additional Product Literature
Safety Data Sheets

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Biodegradable Plastics, Hot Melt Polyesters, Polybutylene Terephthalate, Polyester Coatings, Polyester Plasticizers, Polyurethane Manufacturing, Solvent
Leveler and Brightener
Electronics, Textiles
Cleaner, Solvency, Wetting Agent
Agricultural, Biocides, Metal Finishing, Pharmaceuticals
Corrosion Inhibitor
Adhesives, Chemical Processing
Adhesives, Reaction Solvent, Solvent

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Formulations and Solution Properties

Molecular weight: 99.1
Physical form: Clear liquid
Color (APHA): 50 max.
Purity: 99.8% min.
Moisture content: 0.05% max.
Boiling point: 202°C
Flash point: 93°C
Freezing point: -24.4°C
Vapor pressure: 0.29 mm Hg @ 25°C
Viscosity: 1.7 cp @ 25°C
Specific gravity: 1.027 @ 25°C
Dipole moment: 4.09 debye @ 25°C
Dielectric constant: 32.0/10 kHz @ 25°C
Interfacial surface tension: 40.7 mN/M @ 25°C
Hansen Solubility parameters
dd = 8.8 dp = 6.0
dh = 3.5 dt = 11.2



M-Pyrol N-Methyl 2 Pyrrolidon
N-Methyl 2 Pyrrolidone M-Pyrol solvent chemical structure

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More Specialties
Adhesives, Agricultural, Cleaning, Electronics, Graphics, Membranes, Paint and Coatings, Petrochemical, Pharmaceuticals, Textiles
Cleaner, Cleaning Aid, Coating Remover, Extraction Solvent, Insulating Diluent, Reaction Medium, Reaction Solvent, Soldering Flux, Solvent, Spinning Solvent, Stripper, Viscosity Modifier, Welding Co-solvent