France's R-Nano Register Faces Overhaul Due to Revised EU Nanomaterial Definition
ANSES's recent note indicates that France's mandatory R-Nano declaration for nanoparticles will undergo significant changes, impacting compliance for manufacturers using or importing nanomaterials.
Paris, France — 03 June 2026
The Agence nationale de sécurité sanitaire de l'alimentation, de l'environnement et du travail (ANSES) has issued a critical advisory (AP-2025-AST-0072) concerning the impact of the updated European nanomaterial definition (2022/C 229/01) on France's R-Nano annual declaration registry. This development, based on a 20 February 2026 note, signals a significant regulatory shift for companies manufacturing, importing, or distributing substances containing nanoparticular ingredients within France.
The revised EU definition for nanomaterials is broader than its predecessor, which will inevitably expand the range of substances falling under R-Nano's purview. Previously, some materials might have been outside the nano-scope; they will now require mandatory declaration. This change primarily affects sectors using fine powders or particles in supplements, cosmetics, food, and industrial applications. Manufacturers must understand that the legal definition, not merely product categorisation, dictates their compliance obligations. ANSES highlighted the necessity for companies to reassess their entire material inventory to avoid non-compliance penalties.
The R-Nano registry, overseen by ANSES, requires annual disclosure of quantities, uses, and identities of substances in nanoparticulate form. The reinterpretation under the new EU guidelines means that internal characterisation data for materials must be robust and aligned with the updated criteria. Companies currently declaring under R-Nano may find their reporting requirements more stringent, while others, previously exempt, will need to establish new declaration processes. The burden of proof for classification will rest squarely with the economic operators.
What this means for France
French supplement manufacturers and brand owners will face immediate compliance challenges. Reformulation windows must be factored in for products that now unexpectedly fall under the nanomaterial definition, potentially impacting Q1 2027 product launches. Procurement leads must meticulously verify material specifications with suppliers to ensure accurate R-Nano declarations, risking supply chain disruptions if data is insufficient. Compliance teams need to budget for increased testing and administrative oversight. Brand positioning may also be affected, as some consumers remain wary of 'nano' labeling. Early internal audits of raw material inventories are essential to mitigate commercial risks and maintain regulatory standing in the competitive French market.
The advisory underscores a proactive approach from the French regulator to harmonise national reporting with EU-level definitions. This alignment aims to enhance transparency and improve public and occupational safety related to nanomaterials. Companies operating in France should anticipate a similar push from other EU member states as they too integrate the updated recommendation into their national regulatory frameworks.
Brand owners increasingly rely on contract-manufacturing partners such as Supplement Factory to navigate these requirements.