The defining line is whether it works solely on the nervous system.
No it isn’t — I recall reading about WW I, where mustard gas was used. It wasn’t neurotoxic, just produced deep, slow-healing skin (and internal) burns. Definitely considered a chemical weapon.[/quote]
Actually you are correct and finding the definition at a glance appears to be difficult however, your arguement for napalm and AO doesnt really hold.