How to Handle Multiple UN Numbers and Hazard Classes for Single SKU

Good day,

I have a business requirement to identify Items with certain UN Numbers when entering Sales Orders. Because of the data structure of relevant shipping regulation tables, it does not appear to be possible to write a query identifies these items with some logical rule. Instead, I must hard-code the relevant UN Number IDs and update this code any time we introduce a new UN Number or regulations change. I would normally turn to DFFs for such a requirement to allow the individuals that manage this data to simply tag the relevant records. There is a seeded and active DFF definition