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)

Names
IUPAC name Potassium hexacyanochromate(III)
Identifiers
CAS Number	13601-11-1
3D model (JSmol)	Interactive image
ChemSpider	19988791 Y
ECHA InfoCard	100.033.694
EC Number	237-079-8
MeSH	Hexacyanochromate
PubChem CID	21123765
CompTox Dashboard (EPA)	DTXSID10929218
InChI InChI=1S/6CN.Cr.3K/c6*1-2;;;;/q;;;;;;-3;3*+1 Y Key: VOCDJOPDZZSPRQ-UHFFFAOYSA-N Y
SMILES [K+].[K+].[K+].N#C[Cr-3](C#N)(C#N)(C#N)(C#N)C#N
Properties
Chemical formula	C6CrK3N6
Molar mass	325.399 g·mol−1
Appearance	Vivid, yellow, opaque crystals
Density	1.71 g/cm3
Solubility in water	30.96 g/100 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

Synthesis and reactions

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

Reduction of hexacyanochromate(III) gives the Cr(II) and Cr(0) derivatives, [Cr(CN)₆]^4- and [Cr(CN)₆]^6-, respectively.^[4]