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P2588

Sigma-Aldrich

Potassium dichromate

BioXtra, ≥99.5%

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Synonym(s):
Potassium bichromate
Linear Formula:
K2Cr2O7
CAS Number:
7778-50-9
Molecular Weight:
294.18
EC Number:
231-906-6
MDL number:
MFCD00011367
UNSPSC Code:
12352302
PubChem Substance ID:
329820141
NACRES:
NA.21

product line

BioXtra

Quality Level

100

Assay

≥99.5%

form

powder or crystals

reaction suitability

reagent type: oxidant

impurities

<0.005% Phosphorus (P)
<0.1% Insoluble matter

pH

3.6 (100 g/L)

mp

398 °C (lit.)

solubility

H2O: 0.1 M at 20 °C, clear, orange

anion traces

sulfate (SO42-): <0.005%

cation traces

Al: <0.0005%
Ca: <0.0005%
Cu: <0.0005%
Fe: <0.001%
Mg: <0.0005%
Na: <0.05%
Pb: <0.001%
Zn: ≤0.001%

SMILES string

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

InChI

1S/2Cr.2K.7O/q;;2*+1;;;;;;2*-1

InChI key

KMUONIBRACKNSN-UHFFFAOYSA-N

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General description

Potassium dichromate, a toxic hexavalent chromium compound, is a strong oxidizing agent. Its nephrotoxicity in humans and animals has been studied. Its crystalline structure has been analyzed. Its ability to induce genetic and DNA methylation alteration has been assessed in Brassica napus L. plants.

Application

Potassium dichromate has been used in experiments to determine the ability of MCM-41-supported nanoscale zero-valent iron (nZVI) sample to remove hexavalent chromium.

Signal Word

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 - STOT SE 3

Target Organs

Cardio-vascular system, Respiratory system

WGK

WGK 3

Flash Point(F)

Not applicable

Flash Point(C)

Not applicable

Regulatory Information

易制爆化学品
危险化学品

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Massimo Labra et al.
Chemosphere, 54(8), 1049-1058 (2003-12-11)
This study evaluated genetic and DNA methylation alteration induced by potassium dichromate in Brassica napus L. plants. Amplified fragment length polymorphism (AFLP) and selective amplification of polymorphic loci (SAMPL) tests revealed dose-related increases in sequence alterations in plantlets exposed to
Eduardo Molina-Jijón et al.
Free radical biology & medicine, 51(8), 1543-1557 (2011-08-16)
We report the role of mitochondria in the protective effects of curcumin, a well-known direct and indirect antioxidant, against the renal oxidant damage induced by the hexavalent chromium [Cr(VI)] compound potassium dichromate (K(2)Cr(2)O(7)) in rats. Curcumin was given daily by
Nanoscale zero-valent iron supported on mesoporous silica: Characterization and reactivity for Cr(VI) removal from aqueous solution.
Petala E, et al.
Journal of Hazardous Materials, 261, 295-306 (2013)
A G Levis et al.
Cancer research, 38(1), 110-116 (1978-01-01)
Treatments for 1 to 4 hr with 10-4 m potassium dichromate, a soluble hexavalent chromium salt with a strong oxidizing power, markedly reduce DNA and RNA accumulation rates in hamster fibroblasts grown in vitro (BHK line), as shown by quantitative
An accurate determination of the crystal structure of triclinic potassium dichromate, K2Cr2O7.
Brandon JK and Brown ID.
Canadian Journal of Chemistry, 46(6), 933-941 (1968)
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