243361

Chrom(III)-kaliumsulfat Dodecahydrat

ACS reagent, ≥98%

• Synonym(e): Chrom-alaun, Kaliumchrom(III)-sulfat Dodecahydrat
• Lineare Formel: CrK(SO₄)₂ · 12H₂O
• CAS-Nummer: 7788-99-0
• Molekulargewicht: 499.40
• EG-Nummer: 233-401-6
• MDL-Nummer: MFCD00149917
• UNSPSC-Code: 12352302
• PubChem Substanz-ID: 329752454
• NACRES: NB.24

Eigenschaften

• Qualität: ACS reagent
• Qualitätsniveau: 200
• Assay: ≥98%; 98.0-102.0% (ACS specification)
• Form: crystals
• Eignung der Reaktion: reagent type: catalyst; core: chromium
• Verunreinigungen: ≤0.01% insolubles
• mp (Schmelzpunkt): 89 °C (lit.)
• Anionenspuren: chloride (Cl^-): ≤0.002%
• Kationenspuren: Al: ≤0.02%; Fe: ≤0.01%; NH₄⁺: ≤0.01%; heavy metals (as Pb): ≤0.01%
• SMILES String: O.O.O.O.O.O.O.O.O.O.O.O.[K+].[Cr+3].[O-]S([O-])(=O)=O.[O-]S([O-])(=O)=O
• InChI: 1S/Cr.K.2H2O4S.12H2O/c;;2*1-5(2,3)4;;;;;;;;;;;;/h;;2*(H2,1,2,3,4);12*1H2/q+3;+1;;;;;;;;;;;;;;/p-4
• InChIKey: ZFVHBEKVAITXHW-UHFFFAOYSA-J

Beschreibung

Allgemeine Beschreibung

Chromium(III) potassium sulfate dodecahydrate (Potassium chromium(III) sulfate dodecahydrate, Chrome alum) is widely used chemical in dyeing and textile industry. It can be synthesized by reacting sulfur dioxide with potassium dichromate (dissolved in sulfuric acid) at -38°C.

Anwendung

Chromium(III) potassium sulfate dodecahydrate [KCr(SO₄)₂.12H₂O] has been used for the dissolution of gelatin in various studies.
It may be used as a starting material in the synthesis of quasi-monodisperse spherical core-shell particles of Cr/α-Cr₂O₃ to be used as solar absorbers.

Sicherheitshinweise

• Piktogramme: GHS07
• Signalwort: Warning
• H-Sätze: H315,H319
• P-Sätze: P264 - P280 - P302 + P352 - P305 + P351 + P338 - P332 + P313 - P337 + P313
• Gefahreneinstufungen: Eye Irrit. 2 - Skin Irrit. 2
• Lagerklassenschlüssel: 11 - Combustible Solids
• WGK: WGK 3