Polychlorinated dibenzofurans

{
  "id": "MLC-T-ENV-021500",
  "term": "Polychlorinated dibenzofurans",
  "field": "Environment",
  "term_source": "Polychlorinated Dibenzofurans",
  "definition": "1. A chemical class containing 135 congeners of which 10 (listed in Table 2) are thought to have dioxin-like toxicity. The polychlorinated dibenzofuran structure consists of two benzene rings joined by one oxygen atom ortho to a carbon-carbon bond linkage and has varying degrees of chlorine atom substitution on the remaining carbon atoms in the rings. PCDFs, like the PCDDs, are not produced intentionally but occur as inadvertent by-products in chemical production processes as well as waste combustion and PCB degradation reactions.\n\n2. Any member of a class of dibenzofurans with two to eight chlorine substituents.\n\n3. A family of 135 individual compounds with varying harmful health and environmental effects. CDFs typically are released to the environment through the incineration of municipal and industrial waste, accidental combustion of polychlorinated biphenyls (PCBs), and the manufacture of certain metals and paper products.",
  "abbreviation": "PCDF",
  "synonyms": [
    "PCDFs"
  ],
  "subject": "Chemical substances",
  "references": [
    "EPA 100/R -08/004 June 2004 Glossary at http://www.epa.gov/nrmrl/pubs0402.html",
    "40 CFR 766.3 (CFR 2013)",
    "ACE Glossary of Terms"
  ],
  "url": "https://mlchart.com/terminology/environment/polychlorinated-dibenzofurans/"
}