N-Methyl-2-pyrrolidone

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N-Methyl-2-pyrrolidone
Names
IUPAC name
1-Methyl-2-pyrrolidone
Other names
N-Methylpyrrolidone
N-Methylpyrrolidinone
NMP
1-Methyl-2-pyrrolidone
Pharmasolve
Properties
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)
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 form salts with acids.

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.

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 cause 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