CAS 7784-24-9 Aluminum potassium sulfate dodecahydrate

Synonyms

MFCD00149143; Potassium alum dodecahydrate; SC-19453; aluminium potassium sulfate--water (1/12); AC1L1XJH; Aluminum potassium sulfate,powder; AKOS025295750; Kalinite; potassium aluminium sulfate dodecahydrate; Potash alum dodecahydrate;

IUPAC Name

aluminum;potassium;disulfate;dodecahydrate;

Molecular Weight

474.372g/mol

Molecular Formula

AlH24KO20S2;

Canonical SMILES

O.O.O.O.O.O.O.O.O.O.O.O.[O-]S(=O)(=O)[O-].[O-]S(=O)(=O)[O-].[Al+3].[K+];

InChI

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;

Storage

Store in a cool, dry place in tightly closed containers. Stable under
normal temperatures and pressures. When kept for a long time at
60-65°C (or over sulfuric acid) potassium alum dodecahydrate
loses water, which is reabsorbed on exposure to air. It becomes
anhydrous at about 200°C.Store at RT.

Complexity

62.2

Covalently-Bonded Unit Count

EC Number

616-521-7

Exact Mass

473.975g/mol

H-Bond Acceptor

H-Bond Donor

Heavy Atom Count

Monoisotopic Mass

473.975g/mol

Topological Polar Surface Area

189A^2

UNII

1L24V9R23S

Application

Aluminum potassium sulfate dodecahydrate, commonly known as potassium alum, serves multiple purposes due to its unique properties. This white, water-soluble crystal is an inorganic sulfate salt of aluminum and potassium, produced by roasting alunite and obtaining the final form through crystallization. Historically, it has been utilized to harden gelatin emulsions and remove stains in photographic negatives when combined with acids. Its capacity to precipitate proteins makes it invaluable in the production of vaccines, where it helps in co-precipitating and adsorbing purified proteins. Additionally, potassium alum functions as a powerful astringent and is used in various dermatological and oral preparations, such as mouthwashes and topical hemostatics. It also finds application in treating hemorrhagic cystitis through intravesical instillation.

January 17, 2025

Highly Reliable in Scientific Applications

Aluminum potassium sulfate dodecahydrate from Alfa Chemistry was integral to our research on vaccine formulation. Its excellent protein precipitation properties ensured consistent results, enhancing our study's reliability and outcome.