Potassium ferricyanide

Potassium ferricyanide is the chemical compound with the formula K3[Fe(CN)6]. This bright red salt contains the octahedrally coordinated [Fe(CN)6]3− ion. It is soluble in water and its solution shows some green-yellow fluorescence. It was discovered in 1822 by Leopold Gmelin.

Potassium ferricyanide
Names
IUPAC name
Potassium hexacyanoferrate(III)
Other names
Red prussiate of Potash,
Prussian red,
Potassium ferricyanide
Identifiers
3D model (JSmol)
ChEBI
ChemSpider
ECHA InfoCard 100.033.916
EC Number
  • 237-323-3
21683
RTECS number
  • LJ8225000
UNII
  • InChI=1S/6CN.Fe.3K/c6*1-2;;;;/q6*-1;+3;3*+1 N
    Key: BYGOPQKDHGXNCD-UHFFFAOYSA-N N
  • InChI=1S/6CN.Fe.3K/c6*1-2;;;;/q6*-1;+3;3*+1
    Key: BYGOPQKDHGXNCD-UHFFFAOYAG
  • [K+].[K+].N#C[Fe-3](C#N)(C#N)(C#N)(C#N)C#N.[K+]
Properties
K3[Fe(CN)6]
Molar mass 329.24 g/mol
Appearance deep red crystals, sometimes small pellets, orange to dark red powder
Density 1.89 g/cm3, solid
Melting point 300 °C (572 °F; 573 K)
Boiling point decomposes
330 g/L ("cold water")
464 g/L (20 °C)
775 g/L ("hot water")
Solubility slightly soluble in alcohol
soluble in acid
soluble in water
+2290.0·10−6 cm3/mol
Structure
monoclinic
octahedral at Fe
Hazards
GHS labelling:
Warning
H302, H315, H319, H332, H335
P261, P264, P270, P271, P280, P301+P312, P302+P352, P304+P312, P304+P340, P305+P351+P338, P312, P321, P330, P332+P313, P337+P313, P362, P403+P233, P405, P501
NFPA 704 (fire diamond)
1
0
0
Flash point Non-flammable
Lethal dose or concentration (LD, LC):
2970 mg/kg (mouse, oral)
Safety data sheet (SDS) MSDS
Related compounds
Other anions
Potassium ferrocyanide
Other cations
Prussian blue
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
N verify (what is YN ?)
Infobox references
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