60152

Chrom(III)-kaliumsulfat Dodecahydrat

purum p.a., ≥98.5% (RT)

• 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: 329758772
• NACRES: NA.21

Eigenschaften

• Qualität: purum p.a.
• Assay: ≥98.5% (RT)
• Form: crystals
• mp (Schmelzpunkt): 89 °C (lit.)
• Anionenspuren: chloride (Cl^-): ≤200 mg/kg
• Kationenspuren: Ca: ≤500 mg/kg; Cd: ≤50 mg/kg; Co: ≤50 mg/kg; Cu: ≤50 mg/kg; Fe: ≤200 mg/kg; Na: ≤1000 mg/kg; Ni: ≤50 mg/kg; Pb: ≤50 mg/kg; Zn: ≤50 mg/kg
• 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 a violet colored solid. It has been synthesized by reacting sulfur dioxide with potassium dichromate (diisolved in sulfuric acid) at -38°C. It is widely used chemical in dyeing and textile industry.

Anwendung

Chromium(III) potassium sulfate dodecahydrate (KCr(SO₄)₂.12H₂O) may be used for coating the slides for microscopic studies on Periplaneta americana. It may be used in the preparation of quasi-monodisperse spherical core-shell particles of Cr/α-Cr₂O₃.

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