Potassium ferrocyanide

Potassium ferrocyanide

chembox
Name = Potassium ferrocyanide
ImageFile = Potassium-ferrocyanide-trihydrate-sample.jpg
ImageSize = 250px
ImageName = Potassium ferrocyanide trihydrate
IUPACName = Potassium hexacyanoferrate(II)
OtherNames = Tetrapotassium ferrocyanide, trihydrate; Ferrate (4-), hexacyano, tetrapotassium, trihydrate [cite web |url=http://physchem.ox.ac.uk/MSDS/PO/potassium_ferrocyanide_trihydrate.html |title=Safety (MSDS) data for potassium ferrocyanide trihydrate |date=2006-02-17 |accessdate=2008-02-25 |format= |work=]
Section1 = Chembox Identifiers
CASNo = 13943-58-3 (anhydrous product); 14459-95-1 (trihydrate)
RTECS =
Section2 = Chembox Properties
Formula = C6N6FeK4
MolarMass = 422.39 g/mol (trihydrate)
Appearance = Yellow, crystalline granules.
Density = 1.85 g/cm3, solid
Solubility = 28.9 g/100 mL (water, 20 °C)
MeltingPt = (? K)
BoilingPt = "decomposes"
Section8 = Chembox Related
OtherAnions = Potassium ferricyanide

Potassium ferrocyanide, also known as yellow prussiate of potash or potassium hexacyanoferrate(II), is a coordination compound of formula K4 [Fe(CN)6] ·3H2O, which forms lemon-yellow monoclinic crystals at room temperature, and which decomposes at its boiling point. It is insoluble in alcohol but a litre of water can dissolve just under three hundred grams of the crystals, and the solution can react with acid to release hydrogen cyanide (HCN) gas. The resulting HCN gas boils at 26 °C and, being lighter than air (with a gaseous density of 0.94), quickly evaporates clear of the release point. Potassium ferrocyanide itself is only slightly toxic. [cite web |url=http://www.jtbaker.com/msds/englishhtml/p5763.htm |title=Potassium ferrocyanide MSDS |author=JT Baker, Inc. |date=2006-02-13 |accessdate=2008-02-25 |format= |work=]

On February 20, 2002 four Moroccans were arrested while in possession of detailed maps of the United States embassy in Rome and the Rome water supply network, as well as four kilograms of potassium ferrocyanide.

When combined with ferric (iron) salts, potassium ferrocyanide forms the pigment Prussian blue.

See also

*ferrocyanide
*potassium ferricyanide

References

External links

* [http://www.npi.gov.au/database/substance-info/profiles/29.html National Pollutant Inventory - Cyanide compounds fact sheet]


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Look at other dictionaries:

  • Potassium ferrocyanide — Ferrocyanide Fer ro*cy a*nide (? or ?; 104), n. [Ferro + cyanide.] (Chem.) One of a series of complex double cyanides of ferrous iron and some other base. [1913 Webster] {Potassium ferrocyanide} (Chem.), yellow prussiate of potash; a tough,… …   The Collaborative International Dictionary of English

  • potassium ferrocyanide — kalio heksacianoferatas(II) statusas T sritis chemija formulė K₄[Fe(CN)₆] atitikmenys: angl. ferrous potassium cyanide; yellow prussiate of potash; potassium ferrocyanide; potassium hexacyanoferrate(II) rus. желтая кровяная соль; калия… …   Chemijos terminų aiškinamasis žodynas

  • potassium ferrocyanide — noun a cyanide compound that is prepared by the reaction of potassium cyanide with ferrous salts; commonly used by gardeners • Syn: ↑yellow prussiate of potash • Hypernyms: ↑ferrocyanide …   Useful english dictionary

  • potassium ferrocyanide — /pəˌtæsiəm fɛroʊˈsaɪənaɪd/ (say puh.taseeuhm feroh suyuhnuyd) noun a yellow crystalline solid, potassium hexacyanoferrate (III), K4Fe(CN)6.H2O, used in dyeing and metallurgy …  

  • potassium ferrocyanide — Chem. a lemon yellow, crystalline, water soluble solid, K4Fe(CN)6·3H2O, used chiefly in casehardening alloys having an iron base and in dyeing wool and silk. Also called yellow prussiate of potash. * * * …   Universalium

  • Ferrocyanide — is the name of the anion Fe(CN)64−. In aqueous solutions, this coordination complex is relatively unreactive. It is usually available as the potassium salt potassium ferrocyanide, which has the formula K4Fe(CN)6. Coordination chemistry [Fe(CN)6]… …   Wikipedia

  • Ferrocyanide — Fer ro*cy a*nide (? or ?; 104), n. [Ferro + cyanide.] (Chem.) One of a series of complex double cyanides of ferrous iron and some other base. [1913 Webster] {Potassium ferrocyanide} (Chem.), yellow prussiate of potash; a tough, yellow,… …   The Collaborative International Dictionary of English

  • Potassium ferricyanide — Chembox new Name = Potassium ferricyanide ImageFile = Potassium ferricyanide.jpg ImageSize = 250px ImageName = Potassium ferricyanide ImageFile1 = Potassium ferricyanide sample.jpg ImageSize1 = 250px ImageName1 = Crystals of potassium… …   Wikipedia

  • potassium hexacyanoferrate(II) — kalio heksacianoferatas(II) statusas T sritis chemija formulė K₄[Fe(CN)₆] atitikmenys: angl. ferrous potassium cyanide; yellow prussiate of potash; potassium ferrocyanide; potassium hexacyanoferrate(II) rus. желтая кровяная соль; калия… …   Chemijos terminų aiškinamasis žodynas

  • ferrocyanide — /fer oh suy euh nuyd , nid/, n. Chem. a salt of ferrocyanic acid, as potassium ferrocyanide, K4Fe(CN)6. [1835 45; FERRO + CYANIDE] * * * …   Universalium

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