Date	Severity	Status	Feedback
Mar 25 2023 10:02PM	Normal	New	link to C3H4O3 (3650542) is dead. This molecule is hydroxypropandial.
Jun 17 2016 3:25PM	High	Acknowledged	hugely faulty melting points and boiling points by alfa aesar and biosynth Thank you for your feedback, this looks like an issue with how data has been added to the record. I've started removing these , but it will probably be a few days before we finish the task
Feb 15 2016 3:39PM	Low	Acknowledged	Thank you Thanks. We're glad you like the site.
Nov 14 2015 12:38AM	Normal	Acknowledged	Why are the hydrogen atoms in this structure numbered H2 to H5 not H1 to H4. G.H.Hill Batchelor of Science (Honours) Thank you for your comment. The ChemSpider database does not provide any numbering of atoms so I'm unsure what you are seeing or what the explaination may be.
May 22 2015 9:52AM	Extreme	Acknowledged	I can not save the structure file. What can be the problem? We just rolled out a new version of the site, and this bug did not appear during testing, so we will need to investigate. Please reply to this email with your browser version and operating system, as this will help us to track down the cause of this problem.
Mar 30 2009 5:52AM	Normal	Fixed	Some links to NMRShiftDB point to wrong structures. Links to NMRSHiftDB checked and removed
Jan 14 2009 5:57AM	Low	Rejected	Hydrocarbon strain(291) unknown please send info file(F12) Rejected..makes no sense.
May 13 2008 5:26PM	Low	Fixed	No UV-Vis spectrum ?! Somebody had submitted an empty file. Deleted
May 13 2008 5:02PM	Normal	Fixed	Please check link to data source ´SMID´ Data Source : SMID External ID(s) : CH2, CH3, FLH, CHM, COB, DML, MEN, TML, TNP, H4Z The SMID datasource will be deprecated. The SMID dataset has been deprecated 05/14/08
Apr 29 2007 9:33PM	Low	Fixed	There are many errors in the synonyms... carbon,Atlantic, methylene,CALCIUM; DIAMOND, Degussa Resolved by identifier curation