Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
Thioformaldehyde is the organosulfur compound with the formula CH2S. This compound is very rarely observed because it oligomerizes to 1,3,5-trithiane, which is a stable colorless compound with the same formula. Despite its instability under normal terrestrial conditions, the molecule has been observed in the interstellar medium]] and has attracted much attention for its fundamental nature. The tendency of thioformaldehyde to form chains and rings is a manifestation of the Double bond rule.
- Despois, D., "Radio Line Observations of Molecular and Isotopic Species in Comet C/1995 O1 (Hale-Bopp) Implications on the Interstellar Origin of Cometary Ices", Earth, Moon, Planets 1999, 79, 103-124.
- Clouthier, D. J.; Ramsay, D. A., "The Spectroscopy of Formaldehyde and Thioformaldehyde", Annual Review of Physical Chemistry 1983, 34, 31-58. doi:10.1146/annurev.pc.34.100183.000335