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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
form:
powder or crystals

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

Storage Class Code

11 - Combustible Solids

WGK

WGK 1

Regulatory Listings

Regulatory Listings are mainly provided for chemical products. Only limited information can be provided here for non-chemical products. No entry means none of the components are listed. It is the user’s obligation to ensure the safe and legal use of the product.

ISHL Indicated Name

Substances Subject to be Indicated Names

ISHL Notified Names

Substances Subject to be Notified Names

JAN Code

237086-VAR:
237086-5G:4548173954882
237086-2.5KG:4548173954868
237086-BULK:
237086-500G:4548173954875
2501105:
237086-100G:4548173954851

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Certificates of Analysis (COA)

Lot/Batch Number
BCCF5046
BCCF1006
BCCF1007
BCCD9423
BCCD4252

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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)
Zhaohui Shi et al.
Bioscience reports, 40(11) (2020-10-06)
Allergic rhinitis (AR) is a non-infectious chronic inflammatory disease of nasal mucosa provoking T helper cell (Th) 17 response. Chlorogenic acid (CGA), one of the most abundant polyphenol compounds in various agricultural products, possesses antiviral, anti-inflammatory, and antibacterial properties. However
Saya Moriyama et al.
The Journal of experimental medicine, 211(7), 1297-1305 (2014-06-11)
Follicular helper T (Tfh) cells access the B cell follicle to promote antibody responses and are particularly important for germinal center (GC) reactions. However, the molecular mechanisms of how Tfh cells are physically associated with GCs are incompletely understood. We
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