Chemical safety and biosafety

Webinar Series on Testing and Assessment Methodologies


The OECD webinars on Testing and Assessment Methodologies focus on selected ongoing projects that will result in the short to medium term in new methodologies to test and assess chemicals. These free webinars are open to potential end users among regulators and contract research organisations who want to get familiar with new standards and approaches. Video recordings of our webinars are made available online afterwards.

REGISTER for an upcoming webinar and watch the video recordings of the past webinar on nanomaterials 

Join us on Thursday 25 February to discuss the scope, content, and use of the Test Guideline No. 318: Dispersion Stability of Nanomaterials in Simulated Environmental Media and its accompanying Guidance Document.

WHEN: ‌ Thursday 25 February at 14:00 CET / 08:00 EST
Duration: 2 hours

Join us to discuss the scope, content, and use of the Test Guideline No. 318: Dispersion Stability of Nanomaterials in Simulated Environmental Media and its accompanying Guidance Document. Further discussions will focus on the scope of the upcoming Test Guideline.

The increased production and wide usage of manufactured nanomaterials suggest a higher probability of finding them in the environment. Therefore, testing the dissolution rate and dispersion stability for toxicity assessment are of paramount importance for adequate hazard assessment.


The recording is available in Spanish / El video está disponible en español

On Tuesday 26 January 2021, Anne Gourmelon (Environment Directorate, OECD), Elijah J. Petersen (National Institute of Standards and Technology); Alan Kennedy (Engineering Research and Development Center) and Gregory Goss (University of Alberta) presented the scope and use of the guidance document No. 317 on aquatic and sediment ecotoxicity testing of nanomaterials. The guidance addresses practical aspects of carrying out valid tests on nanomaterials, and modifications or additions to OECD Test Guidelines procedures intended to improve the accuracy of test results.


Watch our WEBINAR on Training needs, resources, and opportunities for Adverse Outcome Pathways (AOPs)

On 23 and 30 November 2020, the OECD hosted a webinar on training needs, resources, and opportunities for Adverse Outcomes Pathways (AOPs). This interactive webinar discussed opportunities for expanding the AOP community of trainers to meet current needs, considering all available resources. 

The objectives of this webinar were to:

  • outline past and current training activities 
  • receive your input on experiences in conducting and/or receiving training; and
  • gather your views, needs and ideas for the provision of training in the future.

Access the presentations:




Webinars on Adverse Outcome Pathways (AOPs) 

30 January 2020: AOP knowledge base and AOP developing tips | Presentations:

  • Nathalie Delrue from the OECD Environment Directorate introduced the presenters and scope of the webinar | Presentation
  • Clemens Wittwehr from the European Commission Joint Research Centre provided an introduction on AOP-KB | Presentation
  • Dan Villeneuve from the US Environmental Protection Agency provided some tips on the development of AOPs | Presentation
  • Holly Mortensen from the US Environmental Protection Agency presented ways of retrieving information from databases and other AOP tools | Presentation

15 January 2020: Assembling and evaluating weight of evidence and quantitative understanding | Presentations

  • Magda Sachana from the OECD Environment Directorate introduced the presenters and scope of the webinar | Presentation
  • Bette Meek from the University of Ottawa provided an introduction to WoE for AOPs | Presentation
  • Kristie Sullivan from the Physicians Committee for Responsible Medicine shared examples of implementing WoE in an AOP | Presentation
  • Dan Villeneuve from the US Environmental Protection Agency spoke about quantitative understanding of relationships and why that’s important | Presentation.

30 April 2019: Adverse Outcome Pathway (AOP) framework | Presentations: 

  • Nathalie Delrue (OECD Secretariat): OECD AOP Programme | Presentation
  • Catherine Willett (Humane Society International): An Introduction to AOP framework | Presentation
  • Jason O’Brien (Environment Canada): AOP collaborative development | Presentation
  • Dan Villeneuve (US Environmental Protection Agency): Examples of AOP application in chemical risk assessment | Presentation 


Webinars on Testing and Assessment Methodologies:

27 September 2019: OECD Alternatives to in vivo eye irritation testing

  • Chantra Eskes (Swiss 3Rs Competence Centre): Available test methods and IATA Guidance Document 263 | Presentation
  • Dave Allen (Integrated Laboratory Systems): Alternatives for eye irritation testing: usefulness and limitations | Presentation
  • Bertrand Desprez (Cosmetics Europe): Two defined approaches for ocular toxicity predictions | Presentation

16 January 2019: Defined Approaches for Skin Sensitisation




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