2H-Pyran-2-one

CAS Registry Number®

504-31-4

CAS Name

2H-Pyran-2-one

Molecular Formula

C5H4O2

Molecular Mass

96.08

Cite this Page

2H-Pyran-2-one.   CAS Common Chemistry.   CAS, a division of the American Chemical Society, n.d.   http://commonchemistry.cas.org/detail?cas_rn=504-31-4 (retrieved 2025-03-28) (CAS RN: 504-31-4).  Licensed under the Attribution-Noncommercial 4.0 International License (CC BY-NC 4.0).

Compound Properties

  • Boiling Point (1)

    205 °C

  • Melting Point (2)

    8.5 °C

  • Density (3)

    1.2039 g/cm³ @ Temp: 20 °C

Source(s)

Other Names and Identifiers

InChI

InChI=1S/C5H4O2/c6-5-3-1-2-4-7-5/h1-4H

InChIKey

InChIKey=ZPSJGADGUYYRKE-UHFFFAOYSA-N

SMILES

O=C1C=CC=CO1

Canonical SMILES

O=C1OC=CC=C1

Other Names for this Substance

  • 2H-Pyran-2-one
  • 1,2-Pyrone
  • Coumalin
  • 2,4-Pentadienoic acid, 5-hydroxy-, δ-lactone
  • α-Pyrone

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