Definitions of 'nanomaterial'
European Union (EU)
EU - Commission Recommendation 2011/696/EU, OJ L 275, 20.10.2011 on the definition of nanomaterial - A ‘nanomaterial’ is "a natural, incidental or manufactured material containing particles, in an unbound state or as an aggregate or as an agglomerate and where, for 50 % or more of the particles in the number size distribution, one or more external dimensions is in the size range 1 nm-100 nm. In specific cases and where warranted by concerns for the environment, health, safety or competitiveness the number size distribution threshold of 50 % may be replaced by a threshold between 1 and 50 % […]".
EU - Lövestam, G. et al., 2010, Considerations on a Definition of Nanomaterial for Regulatory Purposes, Nr. EUR 24403 EN: Joint Research Center (JRC) of the European Commission.
EU - Linsinger T. et al., 2012 - Requirements on measurements for the implementation of the European Commission definition of the term 'nanomaterial', 2012.
U.S.A. - From the National Nanotechnology Initiative (NNI) - "Nanomaterials are all nanoscale materials or materials that contain nanoscale structures internally or on their surfaces. These can include engineered nano-objects, such as nanoparticles, nanotubes, and nanoplates, and naturally occuring nanoparticles, such as volcanic ash, sea spray, and smoke. The nanoscale is the dimensional range of approximately 1 to 100 nanometers."
Australia - The National Industrial Chemicals Notification and Assessment Scheme (NICNAS) - NICNAS working definition for 'Industrial Nanomaterial'.
International Organization for Standardization (ISO) - TC 229 Nanotechnologies - Terminology and definitions for nano-objects - Nanoparticle, nanofibre and nanoplate (ISO/TS 27687:2008, Corrected version 2009-02-01).