Case Studies

DuPont conducted three demonstration projects in order to evaluate the comprehensiveness, practicality, and flexibility of the Framework. The three nanomaterials under consideration differed in terms of composition, structure, intended application, stage of development, and DuPont’s role in the development, evaluation, or potential use of the material.

DuPont™ Light Stabilizer 210

The first material, DuPont™ Light Stabilizer 210, is a surface-treated high-rutile phase titanium dioxide. DuPont generated a complete Output Worksheet for this product, addressed all of the base sets, completed a risk evaluation, and selected risk management measures.

  • DuPont™ Light Stabilizer 210 Summary [PDF]
    A four-page overview of the case study
  • DuPont™ Light Stabilizer 210 Output Worksheet [PDF]
    The full Output Worksheet for the case study

Carbon Nanotubes

The second material, carbon nanotubes (CNTs), consists of cylindrical carbon molecules whose novel properties make them potentially useful in a wide variety of applications (e.g., electronics optics, and materials). Both single-walled nanotubes (SWNTs) and multi-walled nanotubes (MWNTs) are being tested.

DuPont developed an Output Worksheet, but it did not address all of the base sets with data because the company’s use of CNTs at this point is in the research and development phase, with potential exposures limited to lab workers.

  • Carbon Nanotubes Summary [PDF]
    A four-page overview of the case study
  • Carbon Nanotubes Output Worksheet [PDF]
    The full Output Worksheet for the case study

Nano-Fe0

The third material, nano-sized zero-valent iron (nano-Fe0), is being developed and evaluated for potential use as a reagent to destroy contaminants in groundwater.

DuPont did not generate a full Output Worksheet for nano-Fe0. Rather, the company used the Framework to identify key uncertainties that must be addressed before DuPont would proceed further with evaluating the application.

  • Nano-Fe0 Summary [PDF]
    A four-page overview of the case study