243361

Chromium(III) potassium sulfate dodecahydrate

ACS reagent, ≥98%

• Synonyme(s) : Chrome alum, Potassium chromium(III) sulfate dodecahydrate
• Formule linéaire : CrK(SO₄)₂ · 12H₂O
• CAS Number: 7788-99-0
• Poids moléculaire : 499.40
• Numéro CE : 233-401-6
• Numéro MDL: MFCD00149917
• Code UNSPSC : 12352302
• ID de substance PubChem : 329752454
• Nomenclature NACRES : NB.24

Propriétés

• Qualité: ACS reagent
• Niveau de qualité: 200
• Essai: ≥98%; 98.0-102.0% (ACS specification)
• Forme: crystals
• Pertinence de la réaction: reagent type: catalyst; core: chromium
• Impuretés: ≤0.01% insolubles
• Pf: 89 °C (lit.)
• Traces d'anions: chloride (Cl^-): ≤0.002%
• Traces de cations: Al: ≤0.02%; Fe: ≤0.01%; NH₄⁺: ≤0.01%; heavy metals (as Pb): ≤0.01%
• Chaîne SMILES: 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
• Clé InChI: ZFVHBEKVAITXHW-UHFFFAOYSA-J

Description

Description générale

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.

Application

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.

Informations sur la sécurité

• Pictogrammes: GHS07
• Mention d'avertissement: Warning
• Mentions de danger: H315,H319
• Conseils de prudence: P264 - P280 - P302 + P352 - P305 + P351 + P338 - P332 + P313 - P337 + P313
• Classification des risques: Eye Irrit. 2 - Skin Irrit. 2
• Code de la classe de stockage: 11 - Combustible Solids
• Classe de danger pour l'eau (WGK): WGK 3