In a recent post, the French Agency for Food, Environmental and Occupational Health & Safety (ANSES) published their main comments submitted to the public consultation on the definition of nanomaterials launched by the EU earlier this year. In their response ANSES states that the definition needs to be “as comprehensive as possible and define nanomaterials in a unique way based on physico-chemical criteria. Sectoral regulations – for cosmetics, biocides, food, etc. – could then clarify which of these nanomaterials should be subject to specific measures: product labelling, specific assessment, authorisation before they are placed on the market, etc”. The Agency also finds it unfortunate that the size thresholds (1-100 nm) used in the current definition were not open to discussion as part of this consultation, as they have no scientific basis. The Agency will publish an opinion by 2022, with the support of a multidisciplinary group of experts, providing more information and perspective on its response to the European consultation (as posted on 23. 07.2021) (link).