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243361

Chromium(III) potassium sulfate dodecahydrate

Name: Chromium(III) potassium sulfate dodecahydrate
Brand: SIGALD

ACS reagent, ≥98%

Synonym(s):

Chrome alum, Potassium chromium(III) sulfate dodecahydrate

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About This Item

Linear Formula:

CrK(SO₄)₂ · 12H₂O

CAS Number:

7788-99-0

Molecular Weight:

499.40

NACRES:

NB.24

PubChem Substance ID:

329752454

UNSPSC Code:

12352302

EC Number:

233-401-6

MDL number:

MFCD00149917

Assay:

≥98%, 98.0-102.0% (ACS specification)

Grade:

ACS reagent

Form:

crystals

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Properties

grade

ACS reagent

Quality Level

200

assay

≥98%, 98.0-102.0% (ACS specification)

form

crystals

reaction suitability

reagent type: catalyst
core: chromium

impurities

≤0.01% insolubles

mp

89 °C (lit.)

anion traces

chloride (Cl^-): ≤0.002%

cation traces

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

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

InChI key

ZFVHBEKVAITXHW-UHFFFAOYSA-J

Description

General description

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.

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pictograms

GHS07

signalword

Warning

hcodes

H315,H319

pcodes

P264 - P280 - P302 + P352 - P305 + P351 + P338 - P332 + P313 - P337 + P313

Hazard Classifications

Eye Irrit. 2 - Skin Irrit. 2

Storage Class

11 - Combustible Solids

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Global Trade Item Number

SKU	GTIN
PH017689-25MG	04022536292991
243361-500G	04061825596211
243361-100G	04061825596204
243361-5G	04061825596228