237086

Aluminum potassium sulfate dodecahydrate

ACS reagent, ≥98%

• Synonym(s): Alum, Potassium alum, Potassium aluminum sulfate dodecahydrate
• 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

Properties

• grade: ACS reagent
• Quality Level: 200
• 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

Description

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

Safety Information

• Storage Class: 11 - Combustible Solids
• wgk_germany: WGK 1