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Definition: Nanomaterial

Science and technology statistics

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.
European Union, Commission Recommendation of 18 October 2011 on the definition of nanomaterial, Official Journal of the European Union No. L 275 of 20.10.2011