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Control of Nanoscale Materials under the Toxic Substances Control Act

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April 6, 2015 -- EPA issued a proposed rule under TSCA section 8(a) to require reporting and recordkeeping information on certain chemical substances when they are manufactured or processed as nanoscale materials. Learn more.

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Nanoscale Materials

Many nanoscale materials are regarded as "chemical substances" under the Toxic Substances Control Act (TSCA). Specifically, chemical substances that have structures with dimensions at the nanoscale -- approximately 1-100 nanometers (nm) -- are commonly referred to as nanoscale materials or nanoscale substances. A human hair is approximately 80,000-100,000 nanometers wide. These chemical substances may have properties different than the same chemical substances with structures at a larger scale, such as greater strength, lighter weight, and greater chemical reactivity. These enhanced or different properties give nanoscale materials a range of potentially beneficial public and commercial applications; however, the same special properties may cause some of these chemical substances to behave differently than conventional chemicals under specific conditions.

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Regulatory Approach

To ensure that nanoscale materials are manufactured and used in a manner that protects against unreasonable risks to human health and the environment, EPA is pursuing a comprehensive regulatory approach under TSCA including:

  • Premanufacture notifications for new nanomaterials
  • An information gathering rule on new and existing nanomaterials
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    Premanufacture Notifications

    TSCA requires manufacturers of new chemical substances to provide specific information to the Agency for review prior to manufacturing chemicals or introducing them into commerce. EPA can take action to ensure that chemicals that may or will pose an unreasonable risk to human health or the environment are effectively controlled.

    Manufacturers are encouraged to contact EPA if they need assistance determining whether their nanoscale materials are subject to new chemical notification requirements.

    Read about EPA's regulation of new chemical substances.

    Since 2005, EPA has received and reviewed over 160 new chemical notices under TSCA for nanoscale materials, including carbon nanotubes, and that number will increase over time. The Agency has taken a number of actions to control and limit exposures to these chemicals, including:

    EPA has permitted limited manufacture of new chemical nanoscale materials through the use of consent orders or Significant New Use Rules (SNUR) 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 (using, for example, the exposure and environmental release limitations discussed above).

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    Information Gathering Rule

    April 6, 2015 -- As part of the Agency's effort to ensure a more comprehensive understanding of nanoscale materials in commerce, EPA proposed one-time reporting and recordkeeping requirements under TSCA section 8(a). This proposed rule would require that companies that manufacture certain chemical substances already in commerce as nanoscale materials notify EPA of information including production volume, methods of manufacture and processing, exposure and release information, and available health and safety data. This proposed rule is not intended to conclude that nanoscale materials as a class, or specific uses of nanoscale materials, are likely to cause harm to people or the environment. Rather, EPA would use information gathered through this reporting rule to determine if any further action under TSCA, including additional information collection, is needed. EPA will accept comments on the proposed rule for 90 days after the date of publication in the Federal Register.

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    International Cooperation

    Fully understanding the environmental applications and implications of nanotechnology requires the concerted efforts of scientists and policy makers across the globe. EPA is working collaboratively with stakeholders both domestically and internationally to address nanoscale materials and their research needs, and to develop international standards for nanotechnology.

    International organizations such as the International Organization for Standardization (ISO) and the Organization for Economic Cooperation and Development (OECD), are engaged in nanotechnology issues.

    Canada-U.S. Regulatory Cooperation Council (RCC) Nanotechnology Initiative

    On February 4, 2011, Prime Minister Stephen Harper and U.S. President Barack Obama announced the creation of the Canada-U.S. Regulatory Cooperation Council to better align the two countries' regulatory approaches in various areas, including nanotechnology. As part of this initiative, a Nanotechnology Work Plan (PDF) (3 pp, 77K) was developed to increase regulatory transparency and coordination between both countries with respect to nanomaterials.

    An important outcome of the initiative was the development of consistent policy principles on the regulatory oversight of nanomaterials, which have now been endorsed by Canada:

    The final reports from this initiative address the issues listed below and include recommendations on ways Canada and the United States can align their work on nanomaterials that are classified as new substances, regulated in Canada and the United States under the Canadian Environmental Protection Act, 1999 (CEPA, 1999) and TSCA, respectively.

    For more information on the Canada-U.S. Regulatory Cooperation Council Nanotechnology Initiative, please email rccnanoccr@ec.gc.ca.

    Organisation for Economic Cooperation and Development (OECD)

    OECD has established a Working Party on Manufactured Nanomaterials (WPMN) Exit EPA Disclaimer that is engaged in a variety of projects to further understanding of the properties and potential risks of nanomaterials:

    EPA is actively participating in the Working Party and contributes to all of the projects which help leverage international expertise and resources. EPA hosted the OECD Expert Meeting on Categorization of Manufactured Nanomaterials on September 17-19, 2014, in Washington, DC. The outcome of the workshop and these OECD projects will contribute to EPA's efforts to evaluate the potential impacts of nanoscale materials on human health and the environment.

    International Organization for Standardization (ISO)

    The ISO has established a technical committee to develop international standards for nanotechnology. This technical committee, ISO/TC 229, is working to develop standards for terminology and nomenclature, metrology and instrumentation, including:

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