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|Title:||The Devil is in the Definition|
|Publisher:||Royal Society of Chemistry|
|Type:||Articles in periodicals and books|
|Abstract:||Nanomaterials are explicitly or implicitly addressed in a variety of legislative provisions worldwide. For legal clarity it is necessary to define the term "nanomaterial" in a regulatory context. This chapter discusses the challenges in finding an appropriate definition in hazard neutral as well as in hazard related contexts. Approaches to find defining criteria can involve specifying quantitative, semi-quantitative and qualitative identifiers. Whereas size is used as criterion to identify nanomaterials in hazard neutral as well as in hazard related contexts other identifiers (certain physico-chemical, novel or unique properties) are used more in hazard driven regulatory contexts. The practical implementation of nanomaterial definitions leads to challenges regarding the measurement of quantitative identifiers and particularly the specification of semi-quantitative and qualitative criteria. In addition, clear and open communication between all stakeholders is needed to establish and implement regulatory definitions of the term nanomaterial in specific contexts and to generate and communicate a broad understanding of the term.|
|JRC Directorate:||Health, Consumers and Reference Materials|
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