Potassium ferrocyanide
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Not to be confused with potassium ferricyanide.
Potassium ferrocyanide 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.
Quick Facts Names, Identifiers ...
Names | |
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IUPAC name
Potassium hexacyanidoferrate(II) | |
Other names | |
Identifiers | |
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3D model (JSmol) |
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ChemSpider | |
ECHA InfoCard | 100.034.279 |
EC Number |
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E number | E536 (acidity regulators, ...) |
PubChem CID |
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UNII |
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CompTox Dashboard (EPA) |
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Properties | |
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) |
trihydrate 28.9 g/100 mL (20 °C) | |
Solubility | insoluble in ethanol, ether |
−130.0·10−6 cm3/mol | |
Hazards | |
GHS labelling: | |
Warning | |
H411 | |
NFPA 704 (fire diamond) | |
Flash point | Non-flammable |
Lethal dose or concentration (LD, LC): | |
LD50 (median dose) |
6400 mg/kg (oral, rat)[3] |
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).
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