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Aluminum potassium sulfate dodecahydrate (CAS 7784-24-9)

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Synonym:Alum; Potassium alum; Potassium aluminum sulfate dodecahydrate
Application:A natural occuring mineral used in many research areas as a source of Al3+
CAS Number:7784-24-9
Molecular Weight:474.39
Molecular Formula:AlK(SO4)2 •12H2O
Refer to Certificate of Analysis for lot specific data (including water content).
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Product NameCatalog #UnitPriceQtyAddFavorites
Aluminum potassium sulfate dodecahydrate sc-202927 100 g $37
Aluminum potassium sulfate dodecahydrate sc-202927A 500 g $98
Aluminum potassium sulfate dodecahydrate sc-202927B 2.5 kg $350
Aluminum potassium sulfate dodecahydrate (alum) is a naturally occurring mineral that has been used in a multitude of applications from printing to electrolytic copper plating. Aluminum has been implicated in either formation or stabilization of beta-pleated amyloid plaques which lead to pathologies such as Alzheimer’s and Parkinson’s disease; these beta sheet aggregates show similarity to amyloid plaques formed via the prion protein (mad cow disease). Alum can be used to probe the role of aluminium in these pathologies and is also used as a catalyst in the synthesis of ammonia, as mordant in staining with carmine, eosine or hematoxylin, and as a hardening agent in microscopy.
Technical Information
Physical State:Solid
Solubility:Soluble in water (140 mg/ml), and glycerol. Insoluble in alcohol.
Storage:Store at room temperature
Melting Point:92° C (lit.)
Density:1.76 g/cm3 at 25° C
Safety and Reference Information
WGK Germany:3
PubChem CID:62667
Merck Index:14: 360
MDL Number:MFCD00149143
EC Number:233-141-3
For Research Use Only. Not Intended for Diagnostic or Therapeutic Use.

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1. Qu, J.H., et al. 2002. J Environ Sci. 14: 49-53. PMID: 11887318
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4. Anderson, M.A., et al. 2010. Chemosphere. 81: 832-826. PMID: 20825969
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