Potassium hexacyanochromate(III)


Potassium hexacyanochromate(III) is an inorganic compound with the formula K3[Cr(CN)6]. It consists of three potassium cations and [Cr(CN)6]3− anion. It is a yellow, air-stable, paramagnetic solid. It is isomorphous with potassium ferricyanide.

Potassium hexacyanochromate(III)
Potassium hexacyanochromate(III), recrystallised from cold water.
The crystals of potassium hexacyanochromate(III) after three recrystallisations
IUPAC name
Potassium hexacyanochromate(III)
  • 13601-11-1
3D model (JSmol)
  • Interactive image
  • 19988791 checkY
ECHA InfoCard 100.033.694 Edit this at Wikidata
EC Number
  • 237-079-8
MeSH Hexacyanochromate
  • 21123765
  • DTXSID10929218 Edit this at Wikidata
  • InChI=1S/6CN.Cr.3K/c6*1-2;;;;/q;;;;;;-3;3*+1 checkY
  • [K+].[K+].[K+].N#C[Cr-3](C#N)(C#N)(C#N)(C#N)C#N
Molar mass 325.399 g·mol−1
Appearance Vivid, yellow, opaque crystals
Density 1.71 g/cm3
30.96 g/l00 mL (20° C)
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
Infobox references

The salt is prepared by treating chromium(III) salts with KCN.[1][2][3]


  1. ^ F. Hein, S. Herzog. "Potassium Hexacyanochromate (III)". In G. Brauer (ed.). Handbook of Preparative Inorganic Chemistry. Vol. 2 (2 ed.). p. 1373.{{cite book}}: CS1 maint: uses authors parameter (link)
  2. ^ Cruser, Frederick Van Dyke; Miller, Edmund H. (1906). "The insoluble Chromicyanides". J. Am. Chem. Soc. 28 (9): 1132–51. doi:10.1021/ja01975a003.
  3. ^ Marvaud, Valérie; Mallah, Talal; Verdaguer, Michel (2004). Potassium Hexacyanochromate(III) and Its 13C-Enriched Analog. Inorganic Syntheses. Vol. 34. p. 144. doi:10.1002/0471653683.ch4.