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Merck
CN

216615

Potassium chromate

ACS reagent, ≥99.0%

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About This Item

Linear Formula:
K2CrO4
CAS Number:
7789-00-6
Molecular Weight:
194.19
NACRES:
NB.24
PubChem Substance ID:
329752190
UNSPSC Code:
12352300
EC Number:
232-140-5
MDL number:
MFCD00011368
Assay:
≥99.0%
Grade:
ACS reagent
Form:
crystals
Solubility:
water: soluble (39.4 g/l (86 °F / 30 °C), 637 g/l (68 °F / 20 °C))

Key Documents

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Product Name

Potassium chromate, ACS reagent, ≥99.0%

InChI key

XMXNVYPJWBTAHN-UHFFFAOYSA-N

InChI

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

SMILES string

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

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.)

solubility

water: soluble (39.4 g/l (86 °F / 30 °C), 637 g/l (68 °F / 20 °C))

anion traces

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

cation traces

Ca: ≤0.005%
Na: ≤0.02%

Quality Level

200

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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.

General description

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

signalword

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

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

Regulatory Information

危险化学品
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Certificates of Analysis (COA)

Lot/Batch Number
MKDB0428
MKCZ2611
MKCX4380
MKCW9297
MKCW8789

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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)
A new method of potassium chromate production from chromite and KOH-KNO3-H2O binary submolten salt system.
Sun Z, et al.
AIChE Journal, 55(10), 2646-2656 (2009)
Eagleson M.
Concise Encyclopedia Chemistry, 881-881 (1994)
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