FDA nanotechnology: new website, confusing NSF definition

Readers interested in how nanomedicine and related products will be regulated may want to explore the new US Food and Drug Administration nanotechnology website, which includes "FDA Regulation of Nanotechnology Products" and six Powerpoint presentations (also posted as html). They've borrowed their nanotech definition from NSF's, which requires a length scale of 1-100 nanometers, and at the same time, controlling or manipulating on the "atomic" scale. Which is it: up to 100 nm, or atomic? This NSF definition has never made sense to me. (The agencies' actual behavior seems to use the 1-100 nm version.)–CP

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