Why is aldicarb on the restricted use pesticide list?

Aldicarb is classified as a Restricted Use Pesticide (RUP) in the United states. RUPs may be purchased and used only by certified applicators. Because aldicarb is rated as highly toxic, products containing aldicarb bear the signal Word DANGER-POISON on the label (ExtoxnetPip). Additionally, a European Commission ruled in January of 2007 that aldicarb could no longer by used as an active ingredient in Temik (Farmers Weekly, 2007).