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Tools Art & Architecture Thesaurus Full Record Display
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Click the icon to view the hierarchy. |
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halon (chlorofluorocarbon, organic material, ... Materials (hierarchy name)) |
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Note: Generic name for any of a class of compounds formerly used as a fire-extinguishing agent. When exposed to flame, these chlorofluorocarbon gases release halogen atoms which interact with hydrogen atoms, suppressing combustion in the process. They also deplete the earth's ozone when exposed to solar ultraviolet light and have consequently been withdrawn from use. Included in the group are Halon: dichlorodifluoromethane, CCl2F2; Halon 1211: bromochlorodifluoromethane, CBrClF2; and Halon 1301: trifluorobromomethane, CBrF3. |
Terms: |
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halon (preferred,C,U,English-P,D,U,N)
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halon (Dutch-P,D,U,U)
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halons (C,U,English,UF,U,U)
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Facet/Hierarchy Code: M.MT |
Hierarchical Position:
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![Hierarchy of Materials Facet](/global/images/global_hierarchy.gif)
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Materials Facet |
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![Hierarchy of Materials (hierarchy name)](/global/images/global_hierarchy.gif)
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.... Materials (hierarchy name) (G) |
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![Hierarchy of materials (substances)](/global/images/global_hierarchy.gif)
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........ materials (substances) (G) |
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![Hierarchy of <materials by composition>](/global/images/global_hierarchy.gif)
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............ <materials by composition> (G) |
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![Hierarchy of organic material](/global/images/global_hierarchy.gif)
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................ organic material (G) |
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![Hierarchy of chlorofluorocarbon](/global/images/global_hierarchy.gif)
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.................... chlorofluorocarbon (G) |
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![Hierarchy of halon](/global/images/global_hierarchy.gif)
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........................ halon (G) |
Additional Notes: |
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Dutch ..... Algemene naam voor een klasse verbindingen die vroeger werden gebruikt als brandblusmiddel. Wanneer ze aan vlammen worden blootgesteld, geven deze chloorfluorkoolstofgassen halogeenatomen af, die reageren met waterstofatomen en daarbij verbranding onderdrukken. Ze onttrekken ook ozon aan de aarde wanneer ze worden blootgesteld aan ultraviolet zonlicht en worden daarom niet meer gebruikt. De groep bestaat uit dichloordifluormethaan (CCl2F2) ofwel Halon 122, broomchloordifluormethaan (CBrClF2) ofwel Halon 1211 en broomtrifluormethaan (CBrF3) ofwel Halon 1301. |
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