2024年9月26日 · They can be gases, liquids, or solid high-molecular weight polymers. Some PFAS are described as long-chain or short-chain, but this does not cover all of the different kinds of structures that are present in the PFAS class, which is very diverse. PFASs can be sorted in many ways based on their structure.

2024年6月4日 · Per- and polyfluoroalkyl substances (PFAS) are a large, complex group of synthetic chemicals that have been used in consumer products around the world since about the 1950s. They are ingredients in various everyday products. For example, PFAS are used to keep food from sticking to packaging or cookware, make clothes and carpets resistant to stains, and create firefighting foam that is more ...

2018. Zurich statement on future actions on per- and polyfluoroalkyl substances (PFASs). Environ Health Perspect 126(8):84502. For more information on the National Institute of Environmental Health Sciences, go to www.niehs.nih.gov. National Institute of Environmental Health Sciences The importance of collaboration

2023年2月7日 · − PFASs are used in high tonnages in a variety of applications − Emissions occur in all life cycle stages − Monitoring data: ubiquitous presence of PFASs in the environment and in humans − PFASs have very high persistence − PFASs are difficult to remove once released into the environment “forever chemicals“

2023年2月7日 · The authorities estimate that around 4.4 million tonnes of PFASs would end up in the environment over the next 30 years unless action is taken. Peter van der Zandt , ECHA’s Director for Risk Assessment said: “This landmark proposal by the five authorities supports the ambitions of the EU’s Chemicals Strategy and the Zero Pollution action ...

NIEHS is supporting an aggressive program of research on human exposure to per- and poly-fluoroalkyl substances (PFAS) chemicals and the potential for PFAS exposure to cause harm to children’s cognitive and neurobehavioral development, immune system dysfunction, endocrine disruption, obesity, diabetes, lipid metabolism, and certain cancers.

of precursors (polymeric PFASs excluded from quantification) iii. 50 ppm for PFASs (polymeric PFASs included). If total fluorine exceeds 50 mg F/kg the manufacturer, importer or downstream user shall upon request provide to the enforcement authorities a proof for the fluorine measured as content of either PFASs or non-PFASs. 3.

2023年3月22日 · a fraction of the PFASs that may be present in products. However, the broad classes of PFASs of interest have been identified (main report, Figure 1) and it is known what they are used for. For each sector a detailed list of PFASs was developed: this list may not be fully comprehensive, but this uncertainty does not affect the conclusions.

2024年11月20日 · 1 (3) P.O. Box 400, FI-00121 Helsinki, Finland | Tel. +358 9 686180 | echa.europa.eu . Progress update on the per- and polyfluoroalkyl substances

2024年3月13日 · Next steps for PFAS restriction proposal. The European Chemicals Agency (ECHA) outlines how its two scientific committees will progress in evaluating the proposal to restrict per- and polyfluoroalkyl substances (PFAS) in Europe.