|3D model (Jmol)||Interactive image|
|Molar mass||54.05 g·mol−1|
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
Propynal has been observed in the interstellar medium. It is hypothesized to be formed from a carbon monoxide-acetylene complex. Another possible pathway is through the reaction of propynylidyne (C3H) with water.
- Zhou, Li; Ralf I. Kaiser (2008), "Pathways to Oxygen-Bearing Molecules in the Interstellar Medium and in Planetary Atmospheres: Cyclopropenone (c-C3H2O) and Propynal (HCCCHO)", The Astrophysical Journal, 686 (2), doi:10.1086/591072/meta
- Xie, Hong-bin; Chang-bin Shao (2007), "Radical-Molecule Reaction C3H + H2O on Amorphous Water Ice: A Promising Route for Interstellar Propynal", The Astrophysical Journal, 670 (1), doi:10.1086/520757/meta