Date	Severity	Status	Feedback
Mar 8 2013 6:22PM	Normal	Acknowledged	The structure given as 1,1-ethanediamine is an impossible structure and is associated with the CAS number for ethylenediamine (1,2-ethanediamine). It needs to be fixed. Thank you for your feedback. The erroneous registry number has now been removed. As for the structure itself - while it is not likely to be a very long-lived species, this is a valid chemical structure for which information can exist, therefore the record itself is valid.