1,2-Propadiene-1,3-dione

CAS Registry Number®

504-64-3

CAS Name

1,2-Propadiene-1,3-dione

Molecular Formula

C3O2

Molecular Mass

68.03

Cite this Page

1,2-Propadiene-1,3-dione.   CAS Common Chemistry.   CAS, a division of the American Chemical Society, n.d.   http://commonchemistry.cas.org/detail?ref=504-64-3 (retrieved 2025-07-18) (CAS RN: 504-64-3).  Licensed under the Attribution-Noncommercial 4.0 International License (CC BY-NC 4.0).

Compound Properties

  • Boiling Point (1)

    6.8 °C

  • Melting Point (1)

    -107 °C

Source(s)

  • (1) PhysProp data were obtained from Syracuse Research Corporation of Syracuse, New York (US)

Other Names and Identifiers

InChI

InChI=1S/C3O2/c4-2-1-3-5

InChIKey

InChIKey=GNEVIACKFGQMHB-UHFFFAOYSA-N

SMILES

C(=C=O)=C=O

Canonical SMILES

O=C=C=C=O

Other Names for this Substance

  • 1,2-Propadiene-1,3-dione
  • Carbon oxide (C3O2)
  • Carbon suboxide
  • Carbon suboxide (C3O2)

Deleted or Replaced CAS Registry Numbers

12076-43-6