Studies have suggested that hydroxylamine (NH2OH) should be formed under various astrophysical processing
conditions, but a recent search for it by Pulliam et al.
in 2012 toward a number of sources, including IRC+10216,
was unsuccessful. Observations were made with the NRAO
12m telescope on
Kitt Peak of 14 rotational transitions.
A modeling study by Garrod, Widicus Weaver, and Herbst predicted that
sufficient hydroxylamine should be produced by grain surface reactions, but upper detection limit determined by
Pulliam et al. is about a million times less than the predicted abundance.
An preliminary report from 2013
suggested that hydroyxlamine had been detected toward the protostar
a recent conference abstract by Dollhopf et al.
only notes non-detection of three rotational transitions.