adding UN numbers identifying hazardous substance

[Gang Fu]

Hi,

Can we add UN numbers that identify hazardous substance? We have thousands of compounds having UN numbers in PubChem, wiki data also expose this cross references.

Here is the wiki page for UN numbers:

http://en.wikipedia.org/wiki/UN_number

Here is the US census list of UN numbers:

https://bhs.econ.census.gov/bhs/cfs/Hazmat%20Code%20List.pdf

Thank you very much!

Best,

Gang