The FDA recently adopted three nanotechnology standards as part of a major update to the administration’s List of Recognized Standards. The documents comprise a Technical Specification (TS) developed by the International Organization for Standardization (ISO) Technical Committee (TC) 229 on Nanotechnologies, and two standards developed by ASTM International (ASTM), a member of the American National Standards Institute (ANSI) and audited designator. ASTM is one of six ANSI-accredited standards developers to achieve audited designator status due to its consistent record of successful voluntary standards development.

Fig. 1 – C540, one member of the class of fullerenes. Members of the fullerene family are a major subject of research falling under the nanotechnology umbrella.
ISO/TS 14101, “Surface Characterization of Gold Nanoparticles for Nanomaterial Specific Toxicity Screen ing: FTIR Method”, adopted by the FDA in January 2015, was developed by ISO TC 229, WG 3, Health, Safety, and Environment, under US leadership.

One of ISO’s most active committees, ISO/TC 229 focuses on the development of nanotechnology standards, including those for terminology and nomenclature; metrology, and instrumentation, test methodologies; modeling and simulations; and science-based health, safety, and environmental practices. To ensure that the United States is strongly represented throughout TC 229’s areas of activity, the ANSI-accredited U.S. Technical Advisory Group (TAG) to ISO TC 229, administered by ANSI, formulates and delivers US positions and proposals to ISO in all areas of nanotechnology. Mirroring ISO TC 229’s four-WG structure, the U.S. TAG is made up of US private- and public-sector experts in nanotechnology who serve as delegates for ISO TC 229 meetings.

The FDA advises referring to the relevant documents for points to consider when assessing whether an FDA-regulated product involves the application of nanotechnology. Among the various properties of gold nanoparticles (Au NPs), surface ligand characteristics are found to play an important role in determining the behavior of Au NPs, including the aggregation/ agglomeration properties of Au NPs in solution, protein binding of these particles to surfaces in cell culture media, and toxicity of Au NPs to living cells. (See Figure 1)

The FDA’s other adopted standards, ASTM E2490, “Standard Guide for Measurement of Particle Size Distribution of Nanomaterials in Suspension by Photon Correlation Spectroscopy (PCS)”, and ASTM E2535, “Standard Guide for Handling Unbound Engineered Nanoscale Particles in Occupational Settings”, were developed by ASTM’s Committee E56 on Nanotechnology.

More detailed information on all three documents referenced can be found in the ANSI-NSP Nanotechnology Standards Database at http://Nanostandards.ansi.org .

ISO/TC 229 Nanotechnologies defines nanotechnology as “application of scientific knowledge to manipulate and control matter predominantly in the nanoscale (approximately 1 nm to 100 nm) to make use of size- and structure-dependent properties and phenomena distinct from those associated with individual atoms or molecules, or extrapolation from larger sizes of the same material.” Encompassing nanoscale science, engineering and technology, nanotechnology involves imaging, measuring, modeling, and manipulating matter at this length scale.