See soorce fer Hydrofluoric acid

{{chembox
| Watchedfields = changed
| verifiedrevid = 464361624
| ImageFileL1 = Hydrogen-fluoride-3D-vdW.svg
| ImageNameL1 = Baw-an-stick model o hydrogen fluoride
| ImageFileR1 = Water molecule 3D.svg
| ImageNameR1 = Baw-an-stick model o watter
| ImageFileL2 = Fluoride_ion.svg
| ImageNameL2 = Baw-an-stick model o the fluoride anion
| ImageFileR2 = Hydronium-3D-vdW.svg
| ImageNameR2 = Baw-an-stick model o the hydronium cation
| ImageFile2 = Hydrogen fluoride.JPG
| ImageSize1 = 250px
| ImageName1 = Hydrofluoric acid
| ImageAlt1 = White plastic bottle wi safety cap is labeled "QP Panreac" abuin smawer text "Hydrofluoric Acid 40% QP" wi 6 translations. In a bricht orange region alang the side, wairnin seembols are clearly veesible.
| OtherNames = Fluorhydric acid<br>Hydronium fluoride
|Section1={{Chembox Identifiers
| ChemSpiderID_Ref = {{chemspidercite|correct|chemspider}}
| ChemSpiderID = 14214
| UNII_Ref = {{fdacite|correct|FDA}}
| UNII = RGL5YE86CZ
| InChI = 1/FH/h1H
| ChEBI_Ref = {{ebicite|correct|EBI}}
| ChEBI = 29228
| StdInChI_Ref = {{stdinchicite|correct|chemspider}}
| StdInChI = 1S/FH/h1H
| StdInChIKey_Ref = {{stdinchicite|correct|chemspider}}
| StdInChIKey = KRHYYFGTRYWZRS-UHFFFAOYSA-N
| SMILES = F
| InChIKey = KRHYYFGTRYWZRS-UHFFFAOYAC
| CASNo = 7664-39-3
| CASNo_Ref = {{cascite|correct|CAS}}
| RTECS = MW7875000
| EINECS = 231-634-8
  }}
|Section2={{Chembox Properties
| Formula = HF 
| MolarMass = nae applicable<br/> (see [[hydrogen fluoride]])
| Appearance = Colourless solution
| Density = 1.15 g/mL (for 48% soln.)
| Solubility = [[Miscible]].
| MeltingPt = Nae applicable<br/> (see [[hydrogen fluoride]])
| BoilingPt = Nae applicable<br/> (see [[hydrogen fluoride]])
| pKa = 3.17<ref>{{cite book |last=Harris |first=Daniel C. |year=2010 |title=Quantitative Chemical Analysis |location=New York |publisher=W. H. Freeman |edition=8th international |pages=AP14 |isbn=1429263091 }}</ref>
  }}
|Section7={{Chembox Hazards
| ExternalSDS = [http://msds.dupont.com/msds/pdfs/EN/PEN_09004a2f801b4efc.pdf duPont MSDS]
| EUClass = {{Hazchem T+}} {{Hazchem C}}
| NFPA-H = 4
| NFPA-F = 0
| NFPA-R = 0
| NFPA-S = ACID
| FlashPt = Non-flammable
| RPhrases = {{R26/27/28}}, {{R35}}
| SPhrases = {{S1/2}}, {{S7/9}}, {{S26}}, {{S36/37}}, {{S45}}
  }}
|Section8={{Chembox Related
| OtherAnions = [[Hydrochloric acid]]<br/>[[Hydrobromic acid]]<br/>[[Hydroiodic acid]]
| OtherCompounds = [[Hydrogen fluoride]]
  }}
}}
'''Hydrofluoric acid''' is a [[solution]] o [[hydrogen fluoride]] (HF) in [[watter]]. It is a precursor tae awmaist aw fluorine compoonds, includin pharmaceuticals sic as [[fluoxetine]] (Prozac), diverse materials sic as [[polytetrafluoroethylene|PTFE]] (Teflon), an elemental [[fluorine]] itsel. It is a colourless solution that is heichly corrosive, capable o dissolvin mony materials, especially [[oxide]]s. Its ability tae dissolve gless haes been kent syne the 17t century, even afore [[Carl Wilhelm Scheele]] prepared it in lairge quantities in 1771.<ref>{{Greenwood&Earnshaw1st|page=921}}</ref> Acause o its heich reactivity taewart gless an moderate reactivity taewart mony metals, hydrofluoric acid is uisually stored in [[plastic]] containers (awtho PTFE is slichtly permeable tae it).<ref name=Ullmann>Aigueperse, J. ''et al.'' (2005) "Fluorine Compounds, Inorganic" in ''Ullmann’s Encyclopedia of Industrial Chemistry'', Wiley-VCH, Weinheim, {{DOI|10.1002/14356007.a11_307}}</ref>

Hydrogen fluoride gas is an acute pushion that mey immediately an permanently damage buffs an the corneas o the een. [[Aqueous]] hydrofluoric acid is a contact-pushion wi the potential for deep, ineetially painless burns an ensuin tissue daith. Bi interferin wi bouk calcium metabolism, the concentratit acid mey an aa cause seestemic toxicity an eventual [[cardiac arrest]] an fatality, efter contact wi as little as 160&nbsp;cm<sup>2</sup> (25 squerr inches) o skin.

==References==
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[[Category:Fluorides]]
[[Category:Nonmetal halides]]
[[Category:Meeneral acids]]