john2072
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Dołączył: 26 Sty 2011
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Skąd: England
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 Wysłany: Pon 3:36, 28 Mar 2011 Temat postu: even among other halogen elements |
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yilai:
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currence of the condition.
Generally, the major uses of fluorochemical compounds fall into three major categories at the turn of the 21st century. The first are the rather stable halocarbon compounds used in medicine such as several types of inhalation anesthetics for anaesthesia. A very major industrial use is in the form of heat tolerant and inert synthetic oils and metalworking lubricants. However [link widoczny dla zalogowanych], there are many fluorochemicals and halocarbon chemicals that are used extensively [link widoczny dla zalogowanych], albeit carefully [link widoczny dla zalogowanych], in organic (meaning carbon containing) chemistry. The unique nature of fluorine, even among other halogen elements, grants halocarbon fluoro compounds unique properties that are indispensable in organic chemical work.Since the discovery of hydrofluoric acid (HF) from calcium fluoride and sulphuric acid in the 17th century, it has been well known to generations of chemists that certain fluorochemical compounds have very unusual properties. The etching of glass has been performed commercially with HF since the 18th century. Despite being a weak acid, it has an unparalleled ability to corrode silicon and calcium. Much of the pure and quite toxic elemental fluorine (F) is produced from HF by electrolysis.Trifluoroacetic Acid (TFA) is another
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