| FDA |
Material that has at least one dimension in the range of approximately 1 to 100 nm and exhibit dimension-dependent phenomena |
| OECD |
Manufactured nanoparticle refers to particles that have a physical size of less than 100 nm in at least two dimensions that are deliberately produced rather than merely emerging as a by-product in activities not targeted to produce these particles |
| EC |
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 if the particles in the number size distribution, one or more external dimensions is the size range 1 to 100 nm |
| ISO |
A material with any external dimension in the nanoscale or having internal structure or surface structure in the nanoscale |
| Health Canada |
Any manufactured product, material, substance, ingredient, device, system, or structure if: (1) it is at or within, the nanoscale in at least one spatial dimension, or (2) it is smaller or larger than the nanoscale in all spatial dimensions and exhibits one or more nanoscale phenomena |
