Date Severity Status Feedback
Apr 19 2016 6:07PM Extreme Acknowledged I need updated research prize
I'm afraid we can't offer advice on this. However, if you have any questions about this ChemSpider record, please do let us know.
Jun 18 2013 2:51PM Normal Acknowledged Hi, I'd like to query the assignment of CAS 50-33-9 to this material. A web search shows multiple websites attributing CAS 501-30-4 to this material and 50-33-9 to chemspider ID 4617. Thanks
Thank you for your feedback CAS RNs are only verifiable against the CAS registry which is a closed source - this means that across the internet/other electronic resources there is a large amount of data that has unknown provenance - this leads to many erroneous CAS associations in the wild. We allow users to provide RNs with their depositions but do not have any method of verifying them. While you can search by RN we would always suggest that it is better to search by name, or better still (because of the way ChemSpider is built) search by structure. I have made changes to this record based on your feedback.
Aug 21 2012 1:53PM Normal Acknowledged 50-33-9 does not appear to be a valid CAS RN for this chemical.
Thank you for your feedback. That Registry Number has now been removed from this record.