OECD Issues Two New Test Guidelines For Nanomaterials

The Organisation for Economic Co-operation and Development (OECD) published on July 2, 2026, two new Test Guidelines (TG) for nanomaterials:

• Test No. 127: Dustiness determination of materials containing nano‑objects and their aggregates and agglomerates: OECD developed the TG to address the need for standardized dustiness test methods applicable to powders containing granular and fibrous nano-objects and their aggregates and agglomerates (NOAA). The objective of the TG is to provide methods for measuring dustiness data that support regulatory decision-making processes. To ensure the robustness and applicability of the methods described, the TG includes comparisons between different approaches, highlighting their respective strengths and limitations.