Ethylene glycol, C2H6O2,
is a dialcohol. As a polyhydroxylated species, it is closely related to sugars. However, most people know
ethylene glycol as one of the two common forms of
automotive antifreeze, along with
propylene glycol. This connection figured into the
press release that announced the discovery of
interstellar ethylene glycol in 2002 by Hollis et al.
Like many other detections of interstellar molecules, ethylene glycol was identified in
by means of radioastronomy. It was first
found in the constellation
in the object known as
Sgr B2, an active
JUNE 2004: Earlier this year, the detection of ethylene glycol in data from comet
Hale-Bopp was reported by
Crovisier et al.