The discovery of the unsaturated
aldehyde propenal (CH2CHCHO) in
Sagittarius B2(N) was reported by
Hollis et al. in 2004 using the
NRAO Green Bank Telescope.
Another aldehyde, propanal, was
Also known as
acrolein, propenal is used as a starting
chemical (feedstock) for other chemicals,
such as polyurethane. It
is toxic and has a pungent odor.