The scope of the Interest Group (IG) is to to provide a venue for all stakeholders to discuss and foster advancements in the development of understanding of chemical degradation and persistence. This specifically concerns any degradation processes that a chemical may undergo whilst in the environment. All aspects of degradation are considered relevant, including rates, pathways, controlling processes and factors, and transformation products. A further objective is to support the development of tools and approaches for assessing degradation and persistence.