As reported in our blog post of May 7, 2021, the European Commission (EC) recently organized a targeted stakeholder consultation to update, test and verify the preliminary results of its review of the 2011 recommendation on the definition of ‘a nanomaterial. According to information published on July 23, 2021 by the French Agency for Food, Environmental and Occupational Health Safety (ANSES), in its response to the consultation, ANSES affirmed that the changes proposed by the CE “tend to restrict the number and type of objects that will ultimately be considered nanomaterials. For example, nanoplastics, as well as some lipid emulsions and nanoparticles, might not be considered to fall under this definition. ANSES specifies that the EC definition “must be as complete as possible and define nanomaterials in a unique way on the basis of physicochemical criteria”. Sectoral regulations, such as cosmetics, biocides and food, could then specify which nanomaterials should be subject to specific measures, including product labeling, specific assessment and authorization, before nanomaterials are released. on the market. ANSES “also regrets that the size thresholds (1-100 nm) retained in the current definition were not discussed in the context of this consultation, because they have no scientific basis”. According to the news item, ANSES will publish an opinion 2022, “With the support of a multidisciplinary expert group”, which provides more information and perspectives on its response to the EC.