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243361

Sigma-Aldrich

Chromium(III) potassium sulfate dodecahydrate

ACS reagent, ≥98%

Sinônimo(s):

Chrome alum, Potassium chromium(III) sulfate dodecahydrate

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About This Item

Fórmula linear:
CrK(SO4)2 · 12H2O
Número CAS:
7788-99-0
Peso molecular:
499.40
Número CE:
233-401-6
Número MDL:
MFCD00149917
Código UNSPSC:
12352300
ID de substância PubChem:
329752454
NACRES:
NB.24

grau

ACS reagent

Nível de qualidade

200

Ensaio

≥98%
98.0-102.0% (ACS specification)

forma

crystals

adequação da reação

reagent type: catalyst
core: chromium

Impurezas

≤0.01% insolubles

pf

89 °C (lit.)

traços de ânion

chloride (Cl-): ≤0.002%

traços de cátion

Al: ≤0.02%
Fe: ≤0.01%
NH4+: ≤0.01%
heavy metals (as Pb): ≤0.01%

cadeia de caracteres 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

chave InChI

ZFVHBEKVAITXHW-UHFFFAOYSA-J

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Descrição geral

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.

Aplicação

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.

Pictogramas

Exclamation mark
GHS07

Palavra indicadora

Warning

Frases de perigo

H315 - H319

Classificações de perigo

Eye Irrit. 2 - Skin Irrit. 2

Código de classe de armazenamento

11 - Combustible Solids

Classe de risco de água (WGK)

WGK 3

Certificados de análise (COA)

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