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.
By the way -- a list of chemicals commonly found in French households would be just as scary. Probably even worse if you looked in the maids' closet in one of JF Kerry's mansions.
Not my words. I was just passing info on from Vietnam Vets.