The U.S. Enviromental Protection Agency (EPA) published in the June 17, 2011, Federal Register a notice describing several possible approaches for obtaining certain additional information on the composition of pesticide products. EPA focuses particularly on information about what nanoscale materials are present in registered pesticide products, and defines “nanoscale material” as “an active or inert ingredient and any component parts thereof intentionally produced to have at least one dimension that measures between approximately 1 and 100 nanometers (nm).” Under one approach, EPA would use Section 6(a)(2) of the Federal Insecticide, Fungicide, and rodenticide Act (FIFRA) to obtain information regarding what nanoscale material is present in a registered pesticide product and its potential effects on humans or the environment. Under an alternative approach, EPA would obtain such information using a data call-in (DCI) under FIFRA Section 3(c)(2)(B). According to the notice, EPA believes FIFRA Section 6(a)(2) “is the most efficient and expedient administrative approach to obtaining information about nanoscale materials in pesticides and EPA would prefer to use this approach.” The notice also proposes a “new approach” that EPA will use to determine on a case-by-case basis whether a nanoscale active or inert ingredient is a “new” active or inert ingredient for purposes of FIFRA and the Pesticide Registration Improvement Act, even when an identical, non-nanoscale form of the nanoscale ingredient is already registered. Comments are due July 18, 2011.