EPA has received and reviewed numerous new chemical notices under TSCA for nanoscale materials including carbon nanotubes. The Agency has taken steps to control or limit exposures to these chemicals, including:
limiting the uses of the nanoscale materials,
requiring the use of personal protective equipment, such as impervious gloves and NIOSH approved respirators, and
limiting environmental releases.
The Agency has also required testing to generate health and environmental effects data where appropriate. EPA has permitted limited manufacture of new chemical nanoscale materials through the use of administrative orders or Significant New Use Rules under TSCA. The Agency has also allowed the manufacture of new chemical nanoscale materials under the terms of certain regulatory exemptions, but only in circumstances where exposures were tightly controlled to protect against unreasonable risks. http://www.epa.gov/oppt/nano/