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Merck

398063

Sigma-Aldrich

Natriumdichromat Dihydrat

ACS reagent, ≥99.5%

Synonym(e):

Natriumbichromat

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About This Item

Lineare Formel:
Na2Cr2O7 · 2H2O
CAS-Nummer:
Molekulargewicht:
298.00
EG-Nummer:
MDL-Nummer:
UNSPSC-Code:
12352302
PubChem Substanz-ID:
NACRES:
NA.21
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Qualität

ACS reagent

Qualitätsniveau

Assay

≥99.5%

Form

crystals

Eignung der Reaktion

reagent type: oxidant

Verunreinigungen

≤0.005% NH4OH ppt.
≤0.005% insolubles

pH-Wert

3.5 (20 °C, 100 g/L)

mp (Schmelzpunkt)

91 °C (lit.)

Anionenspuren

chloride (Cl-): ≤0.005%
sulfate (SO42-): ≤0.01%

Kationenspuren

Al: ≤0.002%
Ca: ≤0.003%

SMILES String

O.O.[Na+].[Na+].[O-][Cr](=O)(=O)O[Cr]([O-])(=O)=O

InChI

1S/2Cr.2Na.2H2O.7O/h;;;;2*1H2;;;;;;;/q;;2*+1;;;;;;;;2*-1

InChIKey

JYDRNIYTFCBIFC-UHFFFAOYSA-N

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Allgemeine Beschreibung

Sodium dichromate dehydrate (SDD), a hexavalent chromium compound[1] is commonly used as an oxidizing agent.[2] Chromium (VI) compounds are genotoxic and group 1 IARC (International Agency for Research on Cancer) carcinogen.[3] SDD is one of the common contaminants found in drinking water. Its toxic effects and carcinogenicity has been studied.[1][3][4][5]

Anwendung

Sodium dichromate dehydrate may be used in preparing Jones reagent which is employed for oxidation reactions.[6] It may be used in the oxidation of arylalkanes.[7]

Signalwort

Danger

Gefahreneinstufungen

Acute Tox. 2 Inhalation - Acute Tox. 3 Oral - Acute Tox. 4 Dermal - Aquatic Acute 1 - Aquatic Chronic 1 - Carc. 1B - Eye Dam. 1 - Muta. 1B - Ox. Sol. 2 - Repr. 1B - Resp. Sens. 1 - Skin Corr. 1B - Skin Sens. 1 - STOT RE 1 Inhalation

Lagerklassenschlüssel

5.1B - Oxidizing hazardous materials

WGK

WGK 3

Flammpunkt (°F)

Not applicable

Flammpunkt (°C)

Not applicable


Zulassungslistungen

Zulassungslistungen werden hauptsächlich für chemische Produkte erstellt. Für nicht-chemische Produkte können hier nur begrenzte Angaben gemacht werden. Kein Eintrag bedeutet, dass keine der Komponenten gelistet ist. Es liegt in der Verantwortung des Benutzers, die sichere und legale Verwendung des Produkts zu gewährleisten.

EU REACH SVHC Candidate List

CAS No.

EU REACH Annex XVII (Restriction List)

CAS No.

EU REACH Annex XIV (Authorisation List)

CAS No.

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Analysenzertifikate (COA)

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Kunden haben sich ebenfalls angesehen

Shaken not stirred; oxidation of alcohols with sodium dichromate.
Lou JD, et al.
Tetrahedron Letters, 47(3), 311-313 (2006)
Chromium Oxidations in Organic Chemistry
Cainelli G and Cardillo G.
Chromium Oxidations in Organic Chemistry, 29-32G-29-32G (2012)
Synthesis of novel types of polyester glycodendrimers as potential inhibitors of urinary tract infections.
Jean-d'Amour KT, et al.
New. J. Chem., 39(5), 4115-4127 (2015)
Lack of genotoxic effects in hematopoietic and gastrointestinal cells of mice receiving chromium (VI) with the drinking water.
De Flora S, et al.
Mutation Research, Reviews in Mutation Research, 659(1), 60-67 (2008)
A chronic oral reference dose for hexavalent chromium-induced intestinal cancer.
Thompson CM, et al.
Journal of Applied Toxicology, 34(5), 525-536 (2014)

Questions

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  1. 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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  2. How can I determine the shelf life / expiration / retest date of this product?

    1 answer
    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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