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A2140

Sigma-Aldrich

Ammonium aluminum sulfate dodecahydrate

ReagentPlus®, ≥99% (titration)

Synonym(s):

Aluminum ammonium sulfate dodecahydrate, Ammonium alum

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About This Item

Linear Formula:
AlNH4(SO4)2 · 12H2O
CAS Number:
7784-26-1
Molecular Weight:
453.33
EC Number:
232-055-3
MDL number:
MFCD00149958
UNSPSC Code:
12352302
PubChem Substance ID:
329770770
NACRES:
NA.55

Quality Level

100

product line

ReagentPlus®

Assay

≥99% (titration)

form

powder or crystals

pH

2.6 (25 °C, 100 g/L)

mp

93.5 °C (lit.)

SMILES string

[Al+3].[H]O[H].[H]O[H].[H]O[H].[H]O[H].[H]O[H].[H]O[H].[H]O[H].[H]O[H].[H]O[H].[H]O[H].[H]O[H].[H]O[H].[H][N+]([H])([H])[H].[O-]S([O-])(=O)=O.[O-]S([O-])(=O)=O

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

InChI key

WZUKKIPWIPZMAS-UHFFFAOYSA-K

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General description

Ammonium aluminum sulfate dodecahydrate, commonly called as ammonium alum, is widely used in the water purification, cosmetic formulation, fertilizers and food preservation. Its thermal decomposition has been studied. It has high latent heat of 251kJkg-1 with a potential use in the heating system. Its utility as a flame-retardant for cotton fabric has been studied.

Application

Ammonium aluminum sulfate dodecahydrate may be used in the preparation of alum (Al(OH)3) gel and monodispersed yttrium aluminum garnet (YAG) powder.

Legal Information

ReagentPlus is a registered trademark of Merck KGaA, Darmstadt, Germany

Storage Class Code

13 - Non Combustible Solids

WGK

WGK 2

Certificates of Analysis (COA)

Search for Certificates of Analysis (COA) by entering the products Lot/Batch Number. Lot and Batch Numbers can be found on a product’s label following the words ‘Lot’ or ‘Batch’.

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Synthesis of monodispersed spherical yttrium aluminum garnet (YAG) powders by a homogeneous precipitation method.
Xu X, et al.
Journal of the American Ceramic Society. American Ceramic Society, 95(12), 3821-3826 (2012)
Thermogravimetry of deposited ammonium aluminum sulfate dodecahydrate used as flame-retardant for cotton fabrics.
Mostashari SM and Mostashari SZ.
Cellulose Chemistry and Technology, 43(9), 455-455 (2009)
Preventive and curative glycoside kaempferol treatments attenuate the TH2-driven allergic airway disease.
Medeiros KCP, et al.
International Immunopharmacology, 9(13), 1540-1548 (2009)
Thermal characterization of ammonium alum.
Lopez-Beceiro J, et al.
Journal of Thermal Analysis and Calorimetry, 104(1), 127-130 (2010)
Flow and heat transfer characteristics of ammonium alum hydrate slurries.
Suzuki H, et al.
International Journal of Refrigeration, 36(1), 81-87 (2013)
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