How? It's not even anywhere near in their purview.
> Most things that are banned multinationally also face production bans for obvious reasons.
The chemical is also produced in Mexico (AFAIK by Viakem and Pyosa) and Brazil (by FMC Quimica do Brasil), and elsewhere. It is imported illegally from outside the country for these ops as far as I'm aware, so whether FMC Corp is producing it or not is immaterial to its availability in the U.S. for these ops.