N-Methyl-2-pyrrolidone

N-Methyl-2-pyrrolidone

Names
IUPAC name 1-Methyl-2-pyrrolidone
Other names N-Methylpyrrolidone N-Methylpyrrolidinone NMP 1-Methyl-2-pyrrolidone Pharmasolve
Identifiers
Jmol-3D images	Image
SMILES CN1CCCC1=O
Properties
Chemical formula	C5H9NO
Molar mass	99.13 g/mol
Appearance	Colorless liquid
Odor	Mild amine odor
Density	1.027 g/cm3 (at 25 °C)
Melting point	−24 °C (−11 °F; 249 K)
Boiling point	202 °C (396 °F; 475 K)
Solubility in water	Miscible
Solubility	Miscible with acetone, benzene, chloroform, diethyl ether, ethanol, ethyl acetate, isopropanol, methanol
Vapor pressure	3.45·10-1 mm Hg at 25 °C
Thermochemistry
Hazards
Safety data sheet	Spectrum
Flash point	95 °C
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
Infobox references

N-Methyl-2-pyrrolidone (NMP) is an organic compound, a 5-membered lactam, widely used as a non-volatile solvent, due to it's ability to dissolve various materials, such as plastics. It has the chemical formula C₅H₉NO.

Properties

Chemical

N-Methyl-2-pyrrolidone will react with acids to form salts.

Physical

N-Methyl-2-pyrrolidone is a colorless liquid, with a faint amine smell. It melts at -24 °C and boils at 202 °C. NMP is miscible with water, as well as most organic solvents, as well as castor oil.

Availability

NMP can be found in some paint strippers. Some art stores carry paint removers containing N-methyl-2-pyrrolidone.

Preparation

Can be prepared by reacting butyrolactone with methylamine.

Projects

• Solvent for dissolving compounds
• Solvent for ultrasonic exfoliation

Handling

Safety

NMP is harmful and exposure has been linked to causing fertility problems. Prolonged exposure may damage internal organs.

Storage

In closed bottles, away from acids.

Disposal

Should be mixed with a more flammable solvent and safely incinerated outside or in an incinerator.

References

Relevant Sciencemadness threads

• NMP from paint stripper
• NMP - Purification - Ideas?