View source for Ammonium aluminium sulfate

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{{chembox
| Name = Ammonium aluminium sulfate dodecahydrate
| ImageFile =
| ImageFile1 =
|   ImageSize1 = 300px
| IUPACName = Aluminium ammonium bis(sulfate) – water (1:12)
|   OtherNames = Ammonium alum<br/>[[Tschernigite]]
| Section1 = {{Chembox Identifiers
|   CASNo = 7784-26-1
|   EINECS = 232-055-3
|   RTECS = WS5640010
|   InChI = 1/Al.H3N.2H2O4S.12H2O/c;;2*1-5(2,3)4;;;;;;;;;;;;/h;1H3;2*(H2,1,2,3,4);12*1H2/q+3;;;;;;;;;;;;;;;/p-3
|   StdInChI = 1S/Al.H3N.2H2O4S.12H2O/c;;2*1-5(2,3)4;;;;;;;;;;;;/h;1H3;2*(H2,1,2,3,4);12*1H2/q+3;;;;;;;;;;;;;;;/p-3
|   InChIKey = WZUKKIPWIPZMAS-DFZHHIFOAD
|   StdInChIKey = WZUKKIPWIPZMAS-UHFFFAOYSA-K
|   ChemSpiderID = 56419
  }}
| Section2 = {{Chembox Properties
|   Reference = <ref name="RubberBible">{{RubberBible62nd|pages=B-75}}.</ref>
|   Formula = (NH<sub>4</sub>)Al(SO<sub>4</sub>)<sub>2</sub>·12H<sub>2</sub>O
|   MolarMass = 453.33 g/mol
|   Appearance = white crystals
|   Density = 1.64 g/cm<sup>3</sup>
|   MeltingPt = 93.5 °C
|   BoilingPt = 120 °C ''dehydr.''
|   Solubility = 15 g/100 ml (20 °C)
  }}
| Section3 = {{Chembox Structure
|   Reference = <ref name="RubberBible"/>
|   CrystalStruct = Cubic
|   SpaceGroup =
|   Coordination = Octahedral (Al<sup>3+</sup>)
|   LattConst_a =
  }}
| Section7 = {{Chembox Hazards
|   Reference = <ref>{{GHS class NZ|id=15938|accessdate=2009-11-23}}.</ref>
|   EUIndex = not listed
|   GHSPictograms = {{GHS07|Skin Irrit. 2; Eye Irrit. 2}}
|   GHSSignalWord = WARNING
|   HPhrases = {{H-phrases|315|319}}
|   PPhrases = {{P-phrases|264|280|302+352|305+351+338|321|332+313|337+313|362}}
|   FlashPt = non-flammable
|   ExternalMSDS = [http://www.jtbaker.com/msds/englishhtml/a2760.htm External MSDS]
  }}
| Section8 = {{Chembox Related
|   OtherCations = [[Sodium aluminium sulfate]]<br/>[[Potassium aluminium sulfate]]<br/>[[Ammonium iron(III) sulfate]]
  }}
}}
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{{chembox
| Name = Ammonium aluminium sulfate
| ImageFile =
| ImageFile1 =
|   ImageSize1 = 300px
| IUPACName = Aluminium ammonium bis(sulfate)
|   OtherNames = Ammonium alum
| Section1 = {{Chembox Identifiers
|   CASNo = 7784-25-0
|   EINECS = 232-055-3
|   RTECS = WS5640010
|   InChI = 1/Al.H3N.2H2O4S/c;;2*1-5(2,3)4/h;1H3;2*(H2,1,2,3,4)/q+3;;;/p-3
|   StdInChI = 1S/Al.H3N.2H2O4S/c;;2*1-5(2,3)4/h;1H3;2*(H2,1,2,3,4)/q+3;;;/p-3
|   InChIKey = LCQXXBOSCBRNNT-DFZHHIFOAY
|   StdInChIKey = LCQXXBOSCBRNNT-UHFFFAOYSA-K
|   ChemSpiderID = 2297489
  }}
| Section2 = {{Chembox Properties
|   Reference = <ref name="RubberBibleB">{{RubberBible62nd|pages=B-74}}.</ref>
|   Formula = (NH<sub>4</sub>)Al(SO<sub>4</sub>)<sub>2</sub>
|   MolarMass = 237.15 g/mol
|   Appearance = white crystals
|   Density = 2.45 g/cm<sup>3</sup>
|   MeltingPt = 
|   BoilingPt = 
|   Solubility = soluble
  }}
| Section3 = {{Chembox Structure
|   Reference = <ref name="RubberBibleB"/>
|   CrystalStruct = Hexagonal
|   SpaceGroup =
|   Coordination = Octahedral (Al<sup>3+</sup>)
|   LattConst_a =
  }}
| Section7 = {{Chembox Hazards
|   EUIndex = not listed
|   FlashPt = non-flammable
  }}
}}
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'''Ammonium aluminium sulfate''', also known as '''ammonium alum''' is a white crystalline [[double sulfate]] usually encountered as the dodecahydrate, [[Chemical formula|formula]] (NH<sub>4</sub>)Al(SO<sub>4</sub>)<sub>2</sub>·12H<sub>2</sub>O. It is used in water purification, in vegetable glues, in porcelain cements, in natural [[deodorant]]s and in tanning, dyeing and in fireproofing textiles.<ref>{{citation | url = http://www.questia.com/library/encyclopedia/alum.jsp | contribution = Alum | title = The Columbia Encyclopedia | year = 2004 | edition = 6th | publisher = Columbia University Press | location = Ithaca, NY | accessdate = 2009-11-23}}.</ref> It is also an [[acidity regulator]] in its use as a [[food additive]] (E523). The dodecahydrate occurs naturally as the rare mineral [[tschermigite]].<ref name="RubberBible"/><ref>{{WebMineral-ref | name = Tschermigite | url = http://webmineral.com/data/Tschermigite.shtml | accessdate = 2009-11-30}}. {{MinDat-ref | name = Tschemigite | id = 4036 | accessdate = 2009-11-30}}.</ref>

No human or ecological (for reduced concentrations) toxicity registered.<ref>{{citation | title = PAN Pesticide Database | url = http://www.pesticideinfo.org/Detail_Chemical.jsp?Rec_Id=PC33857 | contribution = Ammonium alum | publisher = Pesticides Action Network | accessdate = 2009-11-23}}. </ref>

== Uses ==
The pH of the solution resulting from the topical application of ammonium alum with perspiration is typically in the slightly acid range, from 4 to 5.<ref>{{citation | url = http://www.jtbaker.com/msds/englishhtml/a2760.htm | title = Aluminum Ammonium Sulfate Material Safety Data Sheet | publisher = J. T. Baker | date = March 2009 | accessdate = 2009-11-23}}.</ref> 
It is a popular deodorant<!-- because of its high availability and low cost{{Fact|date=January 2008}}-->. A 120 gram stone lasts for at least a year of daily usage – much longer than other deodorants and antiperspirants. It is also [[hypoallergenic]] and non-staining.{{Fact|date=January 2008}} [[Potassium alum]] is also used for this purpose.

==References==
{{reflist}}

==External links==
*{{EHC|194|name=Aluminium}}
*{{HSDB|name=Aluminum compounds}}
*{{JEFCA-mono|url=http://www.inchem.org/documents/jecfa/jecmono/v024je07.htm | name=Aluminium | whoseries=24}}

[[Category:Aluminium compounds]]
[[Category:Ammonium compounds]]
[[Category:Sulfates]]
[[Category:Stabilizers]]
[[Category:Firming agents]]

{{Imported from Wikipedia|name=Ammonium aluminium sulfate|id=327460614}}