[klmr]

You make a good point but I wouldn’t banning a potentially dangerous chemical that requires expert use to be safe “entirely unreasonable”. In fact the same is true for most such compounds, at least in large parts of Western Europe (less so in the US, I think, but something as harmless as Sudafed is a counter-example): there are many industrial chemicals which you cannot (or only via detours) purchase legally in stores.

I’m generally not a fan of such regulations because most of these chemicals have no common use and the potential for abuse is therefore relatively small. But for many pesticides and herbicides, the potential for harmful misuse is very real.