Watch the webinar replay on Advances in Understanding Per- and Polyfluoroalkyl Substances

The OECD Per- and Polyfluoroalkyl Substances (PFAS) webinar series brings world experts together to share vital information and best practices regarding PFASs. These free webinars are open to the general public. Video recordings of our PFASs webinars are made available online afterwards. Register for an upcoming webinar or watch the video recordings of our past webinars below.



On 6 December 2022, the OECD organised a webinar to present the main conclusions of the report on Understanding Side-Chain Fluorinated Polymers (SCFPs) and Their Life CycleThe webinar also included a presentation of separate research on the Stratified Dipole-Arrays (SDA) theory as a way to better understand PFAS behaviour.

The new OECD report provides a comprehensive overview of the chemical identities of SCFPs that have been on the global market, including a non-exhaustive list of 103 SCFPs and 42 monomers. The report comes with a separate Annex comprising five spreadsheets providing the following information: substances identities, use information, PFAS-impurity studies, degradation studies and SCFP release.


  • Introduction by Eeva Leinala, Environment Directorate, OECD
  • Zhanyun Wang, Empa-Swiss Federal Laboratories for Materials Testing and Research
  • Takeshi Hasegawa, Kyoto University, Japan 

Access the presentations.

Missed our past webinars? Watch the video recordings

October 2022


Martin Mulvihill, General Partner, Safer Made | Presentation

January 2022


Tala Henry and Jeffrey Dawson, US Environmental Protection Agency | Presentation
Valentina Bertato, DG Environment, European Commission | Presentation
Kei Ohno Woodall, Secretariat of the Basel, Rotterdam and Stockholm Convention | Presentation


September 2021

Presentation and report

June 2020


Introduction by Eeva Leinala, Principal Administrator, Environment Directorate, OECD
Nakayama, Centre for Health and Environmental Risk Research, National Institute for Environmental Studies, Japan presented work on worldwide trends in tracing PFAS in the environment | Presentation
Chris Impellitteri, EPA’s Office of Research and Development, United States presented an update on EPA’s Analytical Methods for PFAS | Presentation
Stefan Posner, Independent researcher, presented work on the development of CEN and ISO test methods for the analysis of PFAS in textile and leather | Presentation.

February 2020

Initiative to regulate PFASs at EU level and beyond

September 2019 

Joe Carlin and Jon Hammerschmidt from W.L. Gore & Associates, Inc.

May 2019 

Risk Reduction Initiatives for Per- and Polyfluoroalkyl substances in the United States
Risk Management of Per- and Polyfluoroalkyl substances in Canada.

January 2019

Best Environmental Practices (BEP) for Class B Firefighting Foams

October 2018

Objectives, methodology and technical results of the MIDWOR project - Ruth Garcia-LEITAT
Environmental Impact - Julio Fierro-CETIM
Occupational Risk assessment - Gemma Janer-LEITAT
Project recommendations based on the outputs - Gemma Janer and Marc Torrentellé - LEITAT

September 2018

Best Environmental Practices (BEP) for Textiles - Kai-Volker Schubert

June 2018

OECD work on Per- and Polyfluoroalkyl Substances (PFASs) - Eeva Leinala - OECD
Toward a comprehensive global database of Per- and Polyfluoroalkyl Substances - Zhanyun Wang - ETH Zurich

May 2016

Overall trends of the replacements of Long-Chain Per- and Polyfluoroalkyl Substances (PFASs) - Zhanyun Wang - ETH Zurich