Potassium ferrocyanide

Potassium hexacyanidoferrate(II)
Names
	IUPAC name Potassium hexacyanidoferrate(II)
	Other names (Yellow) Prussiate of Potash; Potassium hexacyanoferrate (II) trihydrate; Tetrapotassium ferrocyanide trihydrate; Ferrate hexacyano tetrapotassium trihydrate;
Identifiers
CAS Number	13943-58-3 (anhydrous) ; 14459-95-1 (trihydrate) ;
3D model (JSmol)	Interactive image;
ChemSpider	20162028;
ECHA InfoCard	100.034.279
EC Number	237-722-2;
E number	E536 (acidity regulators, ...)
PubChem CID	161067;
UNII	GTP1P30292 (anhydrous) ; 961WP42S65 (trihydrate) ;
CompTox Dashboard (EPA)	DTXSID60892423 ;
	InChI InChI=1S/6CN.Fe.4K.3H2O/c61-2;;;;;;;;/h;;;;;;;;;;;31H2/q6-1;+2;4+1;;; Key: UTYXJYFJPBYDKY-UHFFFAOYSA-N;
	SMILES [K+].[K+].N#C[Fe-4](C#N)(C#N)(C#N)(C#N)C#N.[K+].[K+];
Properties
Chemical formula	K4[Fe(CN)6]
Molar mass	368.35 g/mol (anhydrous); 422.388 g/mol (trihydrate)
Appearance	Light yellow, crystalline granules
Density	1.85 g/cm3 (trihydrate)
Boiling point	(decomposes)
Solubility in water	trihydrate ; 28.9 g/100 mL (20 °C)
Solubility	insoluble in ethanol, ether
Magnetic susceptibility (χ)	−130.0·10−6 cm3/mol
Hazards
	GHS labelling:
Pictograms
Signal word	Warning
Hazard statements	H411
NFPA 704 (fire diamond)	1 0 0
Flash point	Non-flammable
	Lethal dose or concentration (LD, LC):
LD50 (median dose)	1.6—3.2g/kg
Related compounds
Other anions	Potassium ferricyanide
Other cations	Sodium ferrocyanide; Prussian blue
	Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa). verify (what is ?) Infobox references

Potassium hexacyanidoferrate(II) is the inorganic compound with formula K₄[Fe(CN)₆]·3H₂O. It is the potassium salt of the coordination complex [Fe(CN)₆]⁴⁻. This salt forms lemon-yellow monoclinic crystals.