Difference between revisions of "Ammonium aluminium sulfate"

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| Section7 = {{Chembox Hazards
 
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|  Reference = <ref>{{GHS class NZ|id=15938|accessdate=2009-11-23}}.</ref>
 
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|  GHSPictograms = {{GHS07|Skin Irrit. 2; Eye Irrit. 2}}
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|  GHSSignalWord = WARNING
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|  HPhrases = {{H-phrases|315|319}}
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|  PPhrases = {{P-phrases|264|280|302+352|305+351+338|321|332+313|337+313|362}}
 
|  FlashPt = non-flammable
 
|  FlashPt = non-flammable
 
|  ExternalMSDS = [http://www.jtbaker.com/msds/englishhtml/a2760.htm External MSDS]
 
|  ExternalMSDS = [http://www.jtbaker.com/msds/englishhtml/a2760.htm External MSDS]

Revision as of 07:45, 23 November 2009

Ammonium aluminium sulfate dodecahydrate
IUPAC name Aluminium ammonium bis(sulfate) – water (1:12)
Other names Ammonium alum
Tschernigite
Identifiers
InChI InChI=1/Al.H3N.2H2O4S.12H2O/c;;2*1-5(2,3)4;;;;;;;;;;;;/h;1H3;2*(H​2,1,2,3,4);12*1H2/q+3;;;;;;;;;;;;;;;/p-3
InChIKey WZUKKIPWIPZMAS-DFZHHIFOAD
Standard InChI InChI=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
Standard InChIKey WZUKKIPWIPZMAS-UHFFFAOYSA-K
CAS number [7784-26-1]
EC number 232-055-3
RTECS WS5640010
ChemSpider 56419
Properties[1]
Chemical formula (NH4)Al(SO4)2·12H2O
Molar mass 453.33 g/mol
Appearance white crystals
Density 1.64 g/cm3
Melting point

93.5 °C

Boiling point

120 °C dehydr.

Solubility in water 15 g/100 ml (20 °C)
Structure[1]
Crystal structure Cubic
Coordination geometry Octahedral (Al3+)
Hazards[2]
Material safety data sheet (MSDS) External MSDS
EU index number not listed
GHS pictograms Skin Irrit. 2; Eye Irrit. 2
GHS signal word WARNING
GHS hazard statements H315, H319
GHS precautionary statements P264, P280, P302+352, P305+351+338, P321, P332+313, P337+313, P362
Flash point non-flammable
Except where noted otherwise, data are given for materials in their standard state (at 25 °C, 100 kPa)
Ammonium aluminium sulfate
IUPAC name Aluminium ammonium bis(sulfate)
Other names Ammonium alum
Identifiers
InChI InChI=1/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
Standard InChI InChI=1S/Al.H3N.2H2O4S/c;;2*1-5(2,3)4/h;1H3;2*(H2,1,2,3,4)/q+3;;;​/p-3
Standard InChIKey LCQXXBOSCBRNNT-UHFFFAOYSA-K
CAS number [7784-25-0]
EC number 232-055-3
RTECS WS5640010
ChemSpider 2297489
Properties[3]
Chemical formula (NH4)Al(SO4)2
Molar mass 237.15 g/mol
Appearance white crystals
Density 2.45 g/cm3
Solubility in water soluble
Structure[3]
Crystal structure Hexagonal
Coordination geometry Octahedral (Al3+)
Hazards
EU index number not listed
Flash point non-flammable
Except where noted otherwise, data are given for materials in their standard state (at 25 °C, 100 kPa)

Ammonium aluminium sulfate, also known as ammonium alum is a white crystalline double sulfate usually encountered as the dodecahydrate, formula (NH4)Al(SO4)2·12H2O. It is used in water purification, in vegetable glues, in porcelain cements, in natural deodorants and in tanning, dyeing and in fireproofing textiles.[4] The dodecahydrate occurs naturally as the rare mineral tschernigite.[1]

No human or ecological (for reduced concentrations) toxicity registered.[5]

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.[6] It is a popular deodorant. 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.[ref. needed] Potassium alum is also used for this purpose.

References

  1. ↑ 1.0 1.1 1.2 CRC Handbook of Chemistry and Physics, 62nd ed.; Weast, Robert C., Ed.; CRC Press: Boca Raton, FL, 1981; pp B-75. ISBN 0-8493-0462-8.
  2. ↑ HSNO Chemical Classification Information Database, <http://www.ermanz.govt.nz/Chemicals/ChemicalDisplay.aspx?SubstanceID=15938> (accessed 23 November 2009), New Zealand Environmental Risk Management Authority.
  3. ↑ 3.0 3.1 CRC Handbook of Chemistry and Physics, 62nd ed.; Weast, Robert C., Ed.; CRC Press: Boca Raton, FL, 1981; pp B-74. ISBN 0-8493-0462-8.
  4. ↑ Alum. In The Columbia Encyclopedia, 6th ed.; Columbia University Press: Ithaca, NY, 2004, <http://www.questia.com/library/encyclopedia/alum.jsp>. (accessed 23 November 2009).
  5. ↑ Ammonium alum. In PAN Pesticide Database; Pesticides Action Network, <http://www.pesticideinfo.org/Detail_Chemical.jsp?Rec_Id=PC33857>. (accessed 23 November 2009).
  6. ↑ Aluminum Ammonium Sulfate Material Safety Data Sheet; J. T. Baker, March 2009, <http://www.jtbaker.com/msds/englishhtml/a2760.htm>. (accessed 23 November 2009).
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