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Key Documents

216615

Sigma-Aldrich

Potassium chromate

ACS reagent, ≥99.0%

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About This Item

Linear Formula:
K2CrO4
CAS Number:
Molecular Weight:
194.19
EC Number:
MDL number:
UNSPSC Code:
12352300
PubChem Substance ID:
NACRES:
NB.24

grade

ACS reagent

vapor density

6.7 (vs air)

Assay

≥99.0%

form

crystals

impurities

≤0.005% insolubles

pH

8.6-9.8 (25 °C, 5%)

mp

971 °C (lit.)

anion traces

chloride (Cl-): ≤0.005%
sulfate (SO42-): ≤0.03%

cation traces

Ca: ≤0.005%
Na: ≤0.02%

SMILES string

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

InChI

1S/Cr.2K.4O/q;2*+1;;;2*-1

InChI key

XMXNVYPJWBTAHN-UHFFFAOYSA-N

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General description

Potassium chromate (K2CrO4) is an inorganic solid compound. It is mainly used as an oxidizing agent in the synthesis of organic compound.

Application

Potassium chromate is used as an oxidizing agent:
  • In the conversion of primary and secondary alcohol into aldehydes and ketones using tetrabutylammonium hydrogen sulfate catalyst.

Potassium chromate is also used:
  • To prepare magnetoactive compound by reacting with iron(II) sulfate.
  • As a reagent in the conversion primary allylic and benzylic halides to aldehydes.

Signal Word

Danger

Hazard Classifications

Aquatic Acute 1 - Aquatic Chronic 1 - Carc. 1B Inhalation - Eye Irrit. 2 - Muta. 1B - Skin Irrit. 2 - Skin Sens. 1 - STOT SE 3

Target Organs

Respiratory system

Storage Class Code

6.1D - Non-combustible acute toxic Cat.3 / toxic hazardous materials or hazardous materials causing chronic effects

WGK

WGK 3

Flash Point(F)

Not applicable

Flash Point(C)

Not applicable


Certificates of Analysis (COA)

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Redetermination of the structures of potassium sulphate and potassium chromate: the effect of electrostatic crystal forces upon observed bond lengths.
McGinnety JA.
Acta Crystallographica Section B, Structural Science, 28(9), 2845-2852 (1972)
Zubeyde Bayram-Weston et al.
Journal of neuroscience methods, 265, 81-88 (2015-10-16)
The Golgi-Cox stain is an established method for characterising neuron cell morphology. The method highlights neurite processes of stained cells allowing the complexity of dendritic branching to be measured. Conventional rapid Golgi and Golgi-Cox methods all require fresh impregnation in
Eagleson M.
Concise Encyclopedia Chemistry, 881-881 (1994)
Eagleson M.
Concise Encyclopedia Chemistry, 887-887 (1994)
Comparative Study of Factors Influencing the Action of Corrosion Inhmitors for Mild Steel in Neutral Solution: II. Potassium Chromate.
Mercer AD and Jenkins IR.
British Corrosion Journal, 3(3), 130-135 (1968)

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