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N-Methylpyrrolidone
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Functional Organic Products
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Amids & Lactams
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Description

N-Methylpyrrolidone (NMP) is a 5-membered cyclic amide that exists as a colorless liquid, though impure samples may appear yellow. It features strong dipole moments and hydrogen bonding due to its cis-amide conformation.

NMP is miscible with water and most common organic solvents, belonging to the class of dipolar aprotic solvents alongside dimethylformamide and dimethyl sulfoxide. It has a characteristic "fishlike" odor and is denser than water, with a flash point of 199°F.

NMP serves as a versatile solvent across multiple industries:

  • Petrochemical Processing: Used in acetylene recovery, aromatics extraction, and gas purification
  • Polymer Industry: Functions as a reaction medium for high-temperature polymers
  • Electronics: Used as a solvent, requiring higher purity specifications
  • Cosmetics: Employed as both a solvent and surfactant

The primary industrial synthesis route involves an ester-to-amide conversion by treating gamma-butyrolactone with methylamine.

 

References

  1. Wikipedia, N-Methyl-2-pyrrolidone.
  2. PubChem, Methylpyrrolidone.
  3. Office of Chemical Safety and Pollution Prevention, U.S. EPA, Feb 2017, Preliminary Information on Manufacturing, Processing, Distribution, Use, and Disposal: N-Methylpyrrolidone (NMP).
  4. Scientific Committee on Consumer Safety (SCCS), 22nd Mar 2011, SCCS/1413/11, OPINION ON N-Methyl-2-pyrrolidone (NMP).
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  UserPic *N-Methylpyrrolidone N-Methylpyrrolidone added. 1/25/2025
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Added by UserPic  Kokel, Nicolas 1/25/2025 7:06 AM