Aluminum potassium sulfate (Potassium alum) is a biochemical reagent with water purification and antimicrobial activities. Aluminum potassium sulfate can be used in research in microbiology and environmental science.

Physicochemical Properties

Molecular Formula	KAL(SO4)2
Molecular Weight	258.21
CAS #	10043-67-1
PubChem CID	24856
Appearance	White to off-white solid powder
Boiling Point	330ºC at 760 mmHg
Melting Point	770ºC (with decomposition)
LogP	0
Hydrogen Bond Acceptor Count	8
Heavy Atom Count	12
Complexity	62.2
Defined Atom Stereocenter Count	0
SMILES	S([O-])([O-])(=O)=O.[K+].[Al+3].S([O-])([O-])(=O)=O
Synonyms	Potassium alum
HS Tariff Code	2934.99.9001
Storage	Powder-20°C 3 years 4°C 2 years In solvent -80°C 6 months -20°C 1 month
Shipping Condition	Room temperature (This product is stable at ambient temperature for a few days during ordinary shipping and time spent in Customs)

Biological Activity

References

[1]. Gianturco S L, et al. Aluminum potassium sulfate: Summary Report[J]. 2021.

Solubility Data

Solubility (In Vitro)	H2O : ~2 mg/mL (~7.75 mM; with ultrasonication (<60°C))
Solubility (In Vivo)	Solubility in Formulation 1: 5 mg/mL (19.36 mM) in Saline (add these co-solvents sequentially from left to right, and one by one), clear solution; with ultrasonication (<60°C)。  (Please use freshly prepared in vivo formulations for optimal results.)

Preparing Stock Solutions		1 mg	5 mg	10 mg
	1 mM	3.8728 mL	19.3641 mL	38.7282 mL
	5 mM	0.7746 mL	3.8728 mL	7.7456 mL
	10 mM	0.3873 mL	1.9364 mL	3.8728 mL

*Note: Please select an appropriate solvent for the preparation of stock solution based on your experiment needs. For most products, DMSO can be used for preparing stock solutions (e.g. 5 mM, 10 mM, or 20 mM concentration); some products with high aqueous solubility may be dissolved in water directly. Solubility information is available at the above Solubility Data section. Once the stock solution is prepared, aliquot it to routine usage volumes and store at -20°C or -80°C. Avoid repeated freeze and thaw cycles.