Potassium chromate

Potassium chromate is the inorganic compound with the formula K2CrO4. This yellow solid is the potassium salt of the chromate anion. It is a common laboratory chemical, whereas sodium chromate is important industrially.

Not to be confused with Potassium dichromate.
Potassium chromate
Names
IUPAC name
Potassium chromate
Other names
Chromic acid, (K2CrO4), dipotassium salt
Identifiers
3D model (JSmol)
ChEBI
ChemSpider
ECHA InfoCard 100.029.218
EC Number
  • 232-140-5
RTECS number
  • GB2940000
UNII
  • InChI=1S/Cr.2K.4O/q;2*+1;;;2*-1 N
    Key: XMXNVYPJWBTAHN-UHFFFAOYSA-N N
  • InChI=K2CrO4
    Key: XMXNVYPJWBTAHN-QALQIXLOAU
  • [O-][Cr](=O)(=O)[O-].[K+].[K+]
Properties
K
2CrO
4
Molar mass 194.189 g·mol−1
Appearance Yellow powder
Odor odorless
Density 2.7320 g/cm3
Melting point 968 °C (1,774 °F; 1,241 K)
Boiling point 1,000 °C (1,830 °F; 1,270 K)
62.9 g/100 mL (20 °C)

75.1 g/100 mL (80 °C)
79.2 g/100 mL (100 °C)
Solubility insoluble in alcohol
−3.9·10−6 cm3/mol
1.74
Structure
rhombic
Hazards
GHS labelling:
H315, H317, H319, H335, H340, H350i, H410
NFPA 704 (fire diamond)
3
0
1
OX
Safety data sheet (SDS) Chemical Safety Data
Related compounds
Other anions
 Potassium dichromate
Potassium molybdate
Potassium tungstate
Other cations
 Sodium chromate
Calcium chromate
Barium chromate
Related chromates
 Potassium hypochromate
Potassium perchromate
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
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Infobox references
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