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243361

Sigma-Aldrich

Chromium(III) potassium sulfate dodecahydrate

ACS reagent, ≥98%

Sinonimo/i:

Chrome alum, Potassium chromium(III) sulfate dodecahydrate

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About This Item

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
Saggio:
≥98%
98.0-102.0% (ACS specification)
Grado:
ACS reagent
Stato:
crystals

Grado

ACS reagent

Livello qualitativo

200

Saggio

≥98%
98.0-102.0% (ACS specification)

Stato

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

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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.

Pittogrammi

Exclamation mark
GHS07

Avvertenze

Warning

Indicazioni di pericolo

H315,H319

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

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Sigma-Aldrich

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Sigma-Aldrich

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Sigma-Aldrich

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Black Cr/α-Cr2O3 nanoparticles based solar absorbers.
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