A member of the UK government's Advisory Committee on Hazardous Substances (ACHS) has described the EU definition of nanomaterials adopted last October as a "lawyers' paradise" that will be difficult for regulators to work with.
The definition, which has already been criticised by NGOs and industry, has no legal force but will be integrated into other EU legislation. It defines nanomaterials as materials for which at least half the particles are between one and 100 nanometres in size.
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