Merck
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237086

Sigma-Aldrich

Aluminum potassium sulfate dodecahydrate

ACS reagent, ≥98%

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:
PubChem Substance ID:
NACRES:
NB.24

Quality Level

grade

ACS reagent

assay

≥98%
98.0-102.0% (ACS specification)

form

powder or crystals

reaction suitability

reagent type: catalyst
core: aluminum

impurities

≤0.005% insolubles

pH

3.3 (94.88 g/L)

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% (by ICP)

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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Application

Aluminum potassium sulfate dodecahydrate has been used:
  • to prepare Mayer′s hematoxylin solution for staining of lung sections and tibialis anterior muscle sections
  • to sensitize experimental mice and establish the allergic rhinitis (AR) mouse model
  • to stain mammary glands for its whole-mount analysis

Packaging

2.5 kg in poly bottle
100, 500 g in poly bottle

Storage Class Code

11 - Combustible Solids

WGK

WGK 1

Certificate of Analysis

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Certificate of Origin

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