Date	Severity	Status	Feedback
Jan 4 2014 12:25PM	Normal	Acknowledged	The MSDS link to http://msds.chem.ox.ac.uk/PE/perchloric_acid.html is no longer available at Oxford's site and should be removed. In fact any MSDS links in the ChemSpider DB from Oxford should be removed... Stuart Chalk Thank you for your feedback. We have updated the name of the data source to reflect that it is no longer supported, and now redirect links to an explanatory page. Some data will not be current, but there is much useful data that is still valid within the data that they made available; melting points and boiling points etc... Therefore, we have chosen to keep this data in our records and alert users where the data comes from so that you can choose if and how you want to use it.