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467820

Sigma-Aldrich

Aluminum potassium sulfate dodecahydrate

ReagentPlus®, ≥99.995%

Synonym(s):
Alum, Potassium alum, Potassium aluminum sulfate dodecahydrate
Linear Formula:
AlK(SO4)2 · 12H2O
CAS Number:
Molecular Weight:
474.39
EC Number:
MDL number:

product line

ReagentPlus®

assay

≥99.995%

impurities

≤0.005% insolubles
<50 ppm total metallic impurities

mp

92 °C (lit.)

density

1.757 g/mL at 25 °C (lit.)

anion traces

chloride (Cl-): ≤5 ppm

cation traces

Fe: ≤0.001%
NH4+: ≤0.005%
Na: ≤0.02%
heavy metals: ≤0.001%

SMILES string

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

InChI

1S/Al.K.2H2O4S.12H2O/c;;2*1-5(2,3)4;;;;;;;;;;;;/h;;2*(H2,1,2,3,4);12*1H2/q+3;+1;;;;;;;;;;;;;;/p-4

InChI key

GNHOJBNSNUXZQA-UHFFFAOYSA-J

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