Basic Information

Chinese Name: N-甲基吡咯烷酮

English Name: N-Methylpyrrolidone

Common Abbreviation: NMP

CAS No.: 872-50-4

Molecular Formula: C₅H₉NO

Molecular Weight: 99.13 g/mol

Appearance: Clear, colorless to pale yellow liquid

Odor: Mild, characteristic amine-like odor

Melting Point: -24 °C

Boiling Point: 202 °C (1 atm)

Flash Point: 91 °C (closed cup)

Density: 1.028 g/cm³ (25 °C)

Solvent Properties

Solubility:

Miscible with water, alcohols, ketones, esters, ethers, chlorinated solvents, and aromatic hydrocarbons.

Excellent solvency for polymers (polyamides, polyimides, PVDF, epoxy resins, etc.), resins, waxes, oils, and many organic/inorganic compounds.

Solvent Characteristics:

High polarity, strong dissolving power for both polar and nonpolar substances.

Wide dissolving range, suitable for high-molecular-weight polymers and complex organic systems.

Low surface tension, good wettability and permeability.

Moderate evaporation rate, easy to control in coating, spinning and film-forming processes.

Main Applications

Electronic & Battery Industry:

Key solvent for lithium-ion battery electrode binders and coatings.

Cleaning agent for semiconductors, printed circuit boards (PCBs), and precision electronic components.

Polymer & Chemical Processing:

Solvent for spinning, film forming, and processing of polyamides, polyimides, aramid fibers, and engineering plastics.

Reaction solvent and polymerization medium in organic synthesis.

Petrochemical Industry:

Extraction solvent for aromatics (benzene, toluene, xylene).

Used in desulfurization, lube oil refining, and gas treatment.

Coatings, Inks & Industrial Cleaning:

High-performance solvent for high-grade coatings, inks, and adhesives.

Industrial precision cleaner for metals, plastics, and composite materials.

Pharmaceuticals & Agrochemicals:

Reaction solvent, crystallization solvent, and formulation auxiliary in drug and pesticide synthesis.

Safety

GHS Hazard Classification:

H319: Causes serious eye irritation.

H336: May cause drowsiness or dizziness.

H361: Suspected of damaging fertility or the unborn child.

H412: Harmful to aquatic life with long lasting effects.

Health Hazards:

May irritate skin, eyes, and respiratory tract.

Prolonged or repeated exposure may affect the nervous system and reproductive system.

Handling & Storage:

Use in well-ventilated areas; avoid inhalation and skin contact.

Wear protective gloves, safety goggles, and protective clothing.

Store in a cool, dry, well-ventilated place, away from oxidants, strong acids, and strong bases.

Environmental Note:

Bioaccumulative potential; restricted in some consumer and industrial applications due to reproductive toxicity.

Waste and discharge must comply with local environmental regulations.