OECD Guideline Updates

In June 2025, the OECD launched a huge package of guideline updates, incl. updates in Section 2 (Effects on Biotic Systems) and Section 4 (Health Effects).

56 new, updated and corrected Test Guidelines (in English and French) were published on 25 June 2025. These guidelines ensure that testing keeps pace with scientific progress and promote best practices in chemical testing, in line with the Replacement, Reduction and Refinement of animal experimentation (3Rs) Principles, and that data generated are covered by Mutual Acceptance across member and adhering countries: Guidelines for the Testing of Chemicals | OECD