General Interest FYI ping
Generally the term chemical weapons or bio weapons are just applied to "human-cides" not those that kill our friends the monochots and dichots. ;-)
The chemicals listed here are mostly "herbi-cides" and defoliants.
Ingested over a long time or in large quantities they are undoubtedly harmful.
I would not call these "chemical weapons used in Viet Nam". I did not see any blister, nerve, or bio-toxin agents on the list.
Let's not resort to hyperbole.