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Merck
CN

398063

Sodium dichromate dihydrate

ACS reagent, ≥99.5%

Synonym(s):

Sodium bichromate

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About This Item

Linear Formula:
Na2Cr2O7 · 2H2O
CAS Number:
7789-12-0
Molecular Weight:
298.00
NACRES:
NA.21
PubChem Substance ID:
329755905
UNSPSC Code:
12352302
EC Number:
234-190-3
MDL number:
MFCD00149166
Assay:
≥99.5%
Grade:
ACS reagent
Form:
crystals

Key Documents

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Product Name

Sodium dichromate dihydrate, ACS reagent, ≥99.5%

InChI key

JYDRNIYTFCBIFC-UHFFFAOYSA-N

InChI

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

SMILES string

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

grade

ACS reagent

assay

≥99.5%

form

crystals

reaction suitability

reagent type: oxidant

impurities

≤0.005% NH4OH ppt.
≤0.005% insolubles

pH

3.5 (20 °C, 100 g/L)

mp

91 °C (lit.)

anion traces

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

cation traces

Al: ≤0.002%
Ca: ≤0.003%

Quality Level

200

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Application

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

General description

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

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Danger

Hazard Classifications

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

Storage Class

5.1B - Oxidizing hazardous materials

wgk

WGK 3

flash_point_f

Not applicable

flash_point_c

Not applicable

Regulatory Information

危险化学品
易制爆化学品
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Certificates of Analysis (COA)

Lot/Batch Number
MKCW6057
MKCV5979
MKCT0564
MKCV2908
MKCR9211

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Chromium Oxidations in Organic Chemistry
Cainelli G and Cardillo G.
Chromium Oxidations in Organic Chemistry, 29-32G-29-32G (2012)
Shaken not stirred; oxidation of alcohols with sodium dichromate.
Lou JD, et al.
Tetrahedron Letters, 47(3), 311-313 (2006)
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)
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)
A chronic oral reference dose for hexavalent chromium-induced intestinal cancer.
Thompson CM, et al.
Journal of Applied Toxicology, 34(5), 525-536 (2014)
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