5-Methyl-2-pyrrolidone

CAS Registry Number®

108-27-0

CAS Name

5-Methyl-2-pyrrolidone

Molecular Formula

C5H9NO

Molecular Mass

99.13

Cite this Page

5-Methyl-2-pyrrolidone.   CAS Common Chemistry.   CAS, a division of the American Chemical Society, n.d.   http://commonchemistry.cas.org/detail?cas_rn=108-27-0 (retrieved 2025-03-31) (CAS RN: 108-27-0).  Licensed under the Attribution-Noncommercial 4.0 International License (CC BY-NC 4.0).

Compound Properties

  • Boiling Point (1)

    92-96 °C @ Press: 1.1-1.6 Torr

  • Melting Point (2)

    43 °C

  • Density (3)

    1.031 g/cm³ @ Temp: 25 °C

Source(s)

Other Names and Identifiers

InChI

InChI=1S/C5H9NO/c1-4-2-3-5(7)6-4/h4H,2-3H2,1H3,(H,6,7)

InChIKey

InChIKey=YVIVRJLWYJGJTJ-UHFFFAOYSA-N

SMILES

CC1NC(=O)CC1

Canonical SMILES

O=C1NC(C)CC1

Other Names for this Substance

  • 2-Pyrrolidinone, 5-methyl-
  • 2-Pyrrolidinone, 5-methyl-, (±)-
  • 5-Methyl-2-pyrrolidinone
  • γ-Valerolactam
  • 5-Methyl-2-pyrrolidone

View All

Deleted or Replaced CAS Registry Numbers

62182-32-5

CAS INSIGHTSTM
A hexagon honeycomb pattern featuring icons representing Data Fabric Analytics, Antennas, Construction, DNA, and Sustainability Bamboo. Each hexagon contains a distinct symbol related to its theme, arranged in a visually appealing and interconnected design.