In a 72-page document dated December 1, 2011, the U.S. Environmental Protection Agency has granted a conditional registration under FIFRA for a pesticide containing nanosilver as an active ingredient.  EPA summarizes its seminal decision as follows:

EPA is granting a conditional registration for the HeiQ Materials AG product named “HeiQ AGS-20” (hereafter referred to as “AGS-20”) under section 3(c)(7)(C) of the Federal Insecticide, Fungicide and Rodenticide Act (FIFRA). The Agency’s basis for the conditional registration is that:

• AGS-20 contains nanosilver as an active ingredient and the nanosilver in AGS-20 is not in any currently registered pesticide;

• Use of AGS-20 will not cause unreasonable adverse effects on the environment during the period when newly required data are being developed;

• Insufficient time has elapsed for HeiQ to generate and submit the newly required data; and

• Use of AGS-20 is in the public interest.

 EPA’s Nano registration decision is attached below