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Merck

243361

Sigma-Aldrich

Chromium(III) potassium sulfate dodecahydrate

ACS reagent, ≥98%

Synonim(y):

Chrome alum, Potassium chromium(III) sulfate dodecahydrate

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5 G
181,00 zł
100 G
228,00 zł
500 G
1550,00 zł

About This Item

Wzór liniowy:
CrK(SO4)2 · 12H2O
Numer CAS:
Masa cząsteczkowa:
499.40
Numer WE:
Numer MDL:
Kod UNSPSC:
12352302
Identyfikator substancji w PubChem:
NACRES:
NB.24

181,00 zł


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klasa czystości

ACS reagent

Próba

≥98%
98.0-102.0% (ACS specification)

Formularz

crystals

przydatność reakcji

reagent type: catalyst
core: chromium

zanieczyszczenia

≤0.01% insolubles

mp

89 °C (lit.)

ślady anionów

chloride (Cl-): ≤0.002%

ślady kationów

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

ciąg 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

Klucz InChI

ZFVHBEKVAITXHW-UHFFFAOYSA-J

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Opis ogólny

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.[1]

Zastosowanie

Chromium(III) potassium sulfate dodecahydrate [KCr(SO4)2.12H2O] has been used for the dissolution of gelatin in various studies.[2][3]
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.[4]
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Piktogramy

Exclamation mark

Hasło ostrzegawcze

Warning

Zwroty wskazujące rodzaj zagrożenia

Klasyfikacja zagrożeń

Eye Irrit. 2 - Skin Irrit. 2

Kod klasy składowania

11 - Combustible Solids

Klasa zagrożenia wodnego (WGK)

WGK 3


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    1. If this product has an expiration or retest date, it will be shown on the Certificate of Analysis (COA, CofA). If there is no retest or expiration date listed on the product's COA, we do not have suitable stability data to determine a shelf life. For these products, the only date on the COA will be the release date; a retest, expiration, or use-by-date will not be displayed.
      For all products, we recommend handling per defined conditions as printed in our product literature and website product descriptions. We recommend that products should be routinely inspected by customers to ensure they perform as expected.
      For products without retest or expiration dates, our standard warranty of 1 year from the date of shipment is applicable.
      For more information, please refer to the Product Dating Information document: https://www.sigmaaldrich.com/deepweb/assets/sigmaaldrich/marketing/global/documents/449/386/product-dating-information-mk.pdf

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  2. How is shipping temperature determined? And how is it related to the product storage temperature?

    1 answer
    1. Products may be shipped at a different temperature than the recommended long-term storage temperature. If the product quality is sensitive to short-term exposure to conditions other than the recommended long-term storage, it will be shipped on wet or dry-ice. If the product quality is NOT affected by short-term exposure to conditions other than the recommended long-term storage, it will be shipped at ambient temperature. As shipping routes are configured for minimum transit times, shipping at ambient temperature helps control shipping costs for our customers. For more information, please refer to the Storage and Transport Conditions document: https://www.sigmaaldrich.com/deepweb/assets/sigmaaldrich/marketing/global/documents/316/622/storage-transport-conditions-mk.pdf

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