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A7167

Sigma-Aldrich

Aluminum potassium sulfate dodecahydrate

ACS reagent, 98.0-102.0%

Synonym(s):

Alum, Potassium alum, Potassium aluminum sulfate dodecahydrate

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About This Item

Linear Formula:
AlK(SO4)2 · 12H2O
CAS Number:
7784-24-9
Molecular Weight:
474.39
MDL number:
MFCD00149143
UNSPSC Code:
12352300

grade

ACS reagent

Assay

98.0-102.0%

impurities

≤0.005% Insoluble matter

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 (as Pb): ≤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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Regulatory Information

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Certificates of Analysis (COA)

Lot/Batch Number
127F0681
100K0270
093H0404
085K0384
073K0045

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