The dectection of propanal (CH3CH2CHO) in
Sagittarius B2(N) by means of the
Green Bank Telescope was reported in 2004 by
Hollis et al..
Propanal was the fourth aldehyde to be detected, following the discoveries of
acetaldehyde (1973-1976), and
propynal (1988). (The -CHO group is one of the
best represented in interstellar molecules: it is also a constituent of
formamide, and newly reported
cyanoformaldehyde.) Hollis et al.
that propanal may be formed from reactions involving propynal (HC2CHO).
Propanal (or propyl aldehyde or
propionaldehyde) is used as a
related chemicals including 1-propanol and propionic acid.