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237086

Sigma-Aldrich

Aluminum potassium sulfate dodecahydrate

ACS reagent, ≥98%

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
EC Number:
233-141-3
MDL number:
MFCD00149143
UNSPSC Code:
12352302
PubChem Substance ID:
329752443
NACRES:
NB.24

grade

ACS reagent

Quality Level

200

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

WGK

WGK 1

Certificates of Analysis (COA)

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Chao Wang et al.
Bio-protocol, 7(10) (2017-07-29)
Muscle function is determined by its structure and fiber type composition. Here we describe a protocol to examine muscle histology and myofiber types using hematoxylin and eosin (H&E) and immunofluorescence staining, respectively. H&E stain nucleus in blue and cytoplasm in
Growth rates of aluminum potassium sulfate crystals in aqueous solutions.
Botsaris GD and Denk Jr EG.
Industrial & Engineering Chemistry Fundamentals, 9(2), 276-283 (1970)
Michael S Sinyakov et al.
Vaccine, 24(42-43), 6534-6541 (2006-07-18)
Bovine serum albumin (BSA) and the surface A-layer protein (AP) of an atypical strain of fish bacterial pathogen Aeromonas salmonicida were covalently linked with polymeric nano- and microparticles, and antigenicity of the resulted conjugates was compared in mice and goldfish.
Eagleson M.
Concise Encyclopedia Chemistry, 886-886 (1994)
Saraswoti Khadge et al.
Journal of mammary gland biology and neoplasia, 23(1-2), 43-58 (2018-03-27)
Studies in rodents have shown that dietary modifications as mammary glands (MG) develop, regulates susceptibility to mammary tumor initiation. However, the effects of dietary PUFA composition on MGs in adult life, remains poorly understood. This study investigated morphological alterations and
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