A2140
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:
Molecular Weight:
453.33
NACRES:
NA.55
PubChem Substance ID:
UNSPSC Code:
12352302
EC Number:
232-055-3
MDL number:
Assay:
≥99% (titration)
Form:
powder or crystals
Quality Segment
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
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
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Storage Class
13 - Non Combustible Solids
wgk
WGK 2
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