Perfluorocarbons

{
  "id": "MLC-T-ENV-020537",
  "term": "Perfluorocarbons",
  "field": "Environment",
  "definition": "1. Potent greenhouse gases that accumulate in the atmosphere and remain there for thousands of years. Aluminum production and semiconductor manufacture are the largest known man-made sources of perfluorocarbons. For more information, visit EPA's High Global Warming Potential Gases and Climate Change page.\n\n2. A group of chemicals composed of carbon and fluorine only. These chemicals (predominantly CF4 and C2F6) were introduced as alternatives, along with hydrofluorocarbons, to the ozone depleting substances. In addition, PFCs are emitted as by-products of industrial processes and are also used in manufacturing. PFCs do not harm the stratospheric ozone layer, but they are powerful greenhouse gases: CF4 has a global warming potential (GWP) of 7,390 and C2F6 has a GWP of 12,200. The GWP is from the IPCC's Fourth Assessment Report (AR4). These chemicals are predominantly human-made, though there is a small natural source of CF4. See ozone depleting substance.\n\n3. A group of human-made chemicals composed of carbon and fluorine only. These chemicals (predominantly CF4 and C2F6) were introduced as alternatives, along with hydrofluorocarbons, to the ozone depleting substances. In addition, PFCs are emitted as by-products of industrial processes and are also used in manufacturing. PFCs do not harm the stratospheric ozone layer, but they are powerful greenhouse gases: CF4 has a global warming potential (GWP) of 6,500 and C2F6 has a GWP of 9,200.\n\n4. A compound consisting of carbon and fluorine. Perfluorocarbons (PFCs) have extremely high global warming potentials and very long lifetimes. They do not deplete stratospheric ozone, but EPA is concerned about their impact on global warming.\n\n5. Class of greenhouse gases consisting on the molecular level of carbon and fluorine.\n\n6. Compound consisting of carbon and fluorine. Perfluorocarbons (PFCs) have extremely high global warming potentials and very long lifetimes. They do not deplete stratospheric ozone, but EPA is concerned about their impact on global warming.\n\n7. A group of chemicals composed of carbon and fluorine only. These chemicals (predominantly CF4 and C2F6) were introduced as alternatives, along with hydrofluorocarbons, to the ozone depleting substances. In addition, PFCs are emitted as by-products of industrial processes and are also used in manufacturing. PFCs do not harm the stratospheric ozone layer, but they are powerful greenhouse gases: CF4 has a global warming potential (GWP) of 7,390 and C2F6 has a GWP of 12,200. The GWP is from the IPCC's Fourth Assessment Report (AR4). These chemicals are predominantly human-made, though there is a small natural source of CF4.",
  "abbreviation": "PFCs",
  "subject": "Climate change",
  "references": [
    "Greening EPA Glossary",
    "Glossary of Climate Change Terms",
    "Greenhouse Gas Emissions",
    "Ozone Layer Protection Glossary",
    "40 CFR 98.6 (CFR 2013)"
  ],
  "url": "https://mlchart.com/terminology/environment/perfluorocarbons/"
}