Aluminum potassium sulfate dodecahydrateA natural occuring mineral used in many research areas as a source of Al3+

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
Purity: ≥98%
Molecular Weight: 474.39
Molecular Formula: AlK(SO4)212H2O
* Refer to Certificate of Analysis for lot specific data (including water content).
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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.


1. Qu, J.H., et al. 2002. J Environ Sci. 14: 49-53. PMID: 11887318
2. House, E., et al. 2004. J. Alzheimers Dis. 6: 291-301. PMID: 15201484
3. Exley, C. and Esiri, M.M. 2006. J. Neurol. Neurosurg. Psychiatr. 77: 877-879. PMID: 16627535
4. Anderson, M.A., et al. 2010. Chemosphere. 81: 832-826. PMID: 20825969

Appearance :
Physical State :
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
For Research Use Only. Not Intended for Diagnostic or Therapeutic Use.
WGK Germany :
PubChem CID :
Merck Index :
14: 360
MDL Number :
EC Number :

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Certificate of Analysis

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Is it possible to purify raw water by using aluminum potassium sulfate?

Asked by: Ntehaseka
We do not have any information about the use of this chemical for that purpose. This chemical is intended for research use only, and is not for diagnostic or therapeutic use.
Answered by: Technical Support
Date published: 2017-08-15
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