N-Methyl pyrrolidone (NMP)


Others Name: NMP; 1-methyl-2-pyrrolidone; N-methyl-2-pyrrolidone

Chemical formula: C5H9NO

Melt: 24 °C

Boiling point: 203 ° C, 81-82 ° C / 10 mmHg

Water soluble: Soluble in water

Density: 1.028

Appearance: colorless transparent oily liquid

Flash point: 91 °C

Application: Chemical lithium-ion batteries

1. Colorless liquid with ammonia smell, this product is less toxic. It is miscible with water and soluble in most organic solvents such as ether and acetone. It can dissolve most organic and inorganic compounds, polar gases, natural and synthetic polymer compounds.

2. Chemical properties: relatively stable in neutral solution. Hydrolysis occurred in 50% to 70% after 8 hours in a 4% sodium hydroxide solution. Hydrolysis occurs gradually in concentrated hydrochloric acid to form 4-methylaminobutyric acid CH3NH(CH2)3COOH. Due to the reaction of the carbonyl group, a ketal or thiopyrrolidone can be formed.

3. Acting with an olefin in the presence of a base catalyst and alkylation at the third position. N-methylpyrrolidone is weakly basic and can form a hydrochloride. An adduct is formed with a heavy metal salt, for example, with nickel bromide heated to 150 ° C to form NiBr 2 (C5H9ON) 3, melting point 105 ° C.

Storage method

Store in a dry, inert atmosphere, keep the container sealed and store in a cool, dry place.

Operational precautions

Avoid exposure: Special guidance is required before use. Avoid contact with skin and eyes. Avoid breathing vapors and fumes. Keep away from fire. -No smoking. Take measures to prevent static buildup.


This product is a good advanced solvent, selective and stable polar solvent, high precision electronics, circuit board, lithium battery, etc., cleaning agent: deoiling, degreasing, dewaxing, polishing, anti-rust, paint stripping, etc. Coatings, inks, and pigments have the advantages of low toxicity, high boiling point, strong solubility, non-flammability, biodegradability, recyclability, safe use, and suitability for a variety of formulations.