| http://www.w3.org/ns/prov#value | - Fluorine is most useful for its compounds such as uranium hexafluoride which is used for processing nuclear fuel, fluorocarbon in the production of teflon, sodium fluoride in toothpaste, hydrofluoric acid for etching glass (since HF can dissolve glass), and formerly Chlorofluorocarbons, which were used as refrigerants in air conditioning and freezers, until they were banned for causing ozone deple
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