243361

Chromium(III) potassium sulfate dodecahydrate

ACS reagent, ≥98%

• Sinonimo/i: Chrome alum, Potassium chromium(III) sulfate dodecahydrate
• Formula condensata: CrK(SO₄)₂ · 12H₂O
• Numero CAS: 7788-99-0
• Peso molecolare: 499.40
• Numero CE: 233-401-6
• Numero MDL: MFCD00149917
• Codice UNSPSC: 12352302
• ID PubChem: 329752454
• NACRES: NB.24

Proprietà

• Grado: ACS reagent
• Saggio: ≥98%; 98.0-102.0% (ACS specification)
• Forma fisica: crystals
• Impiego in reazioni chimiche: reagent type: catalyst; core: chromium
• Impurezze: ≤0.01% insolubles
• Punto di fusione: 89 °C (lit.)
• Anioni in tracce: chloride (Cl^-): ≤0.002%
• Cationi in tracce: Al: ≤0.02%; Fe: ≤0.01%; NH₄⁺: ≤0.01%; heavy metals (as Pb): ≤0.01%
• Stringa SMILE: 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; ZFVHBEKVAITXHW-UHFFFAOYSA-J

Descrizione

Descrizione generale

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.

Applicazioni

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.

Informazioni sulla sicurezza

• Pittogrammi: GHS07
• Avvertenze: Warning
• Indicazioni di pericolo: H315,H319
• Consigli di prudenza: P264 - P280 - P302 + P352 - P305 + P351 + P338 - P332 + P313 - P337 + P313
• Classi di pericolo: Eye Irrit. 2 - Skin Irrit. 2
• Codice della classe di stoccaggio: 11 - Combustible Solids
• Classe di pericolosità dell'acqua (WGK): WGK 3