Crossword clues for ferrocyanide
The Collaborative International Dictionary
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.
Potassium ferrocyanide (Chem.), yellow prussiate of potash; a tough, yellow, crystalline salt, K4(CN)6Fe, the starting point in the manufacture of almost all cyanogen compounds, and the basis of the ferric ferrocyanate, prussian blue. It is obtained by strongly heating together potash, scrap iron, and animal matter containing nitrogen, as horn, leather, blood, etc., in iron pots.
Wiktionary
n. 1 (context chemistry English) any of various salts containing the tetravalent anion Fe(CN)64-; used in making blue pigments 2 (context chemistry English) a complex ion in which a central ferrous iron atom is surrounded by six cyanide ions
WordNet
n. salt of ferrocyanic acid usually obtained by a reaction of a cyanide with iron sulphate
Wikipedia
Ferrocyanide is the name of the anion [Fe( CN)]. Salts of this coordination complex give yellow solutions. It is usually available as the salt potassium ferrocyanide, which has the formula KFe(CN). [Fe(CN)] is a diamagnetic species, featuring low-spin iron(II) center in an octahedral ligand environment. Although many salts of cyanide are highly toxic, ferro- and ferricyanides are less toxic because they tend not to release free cyanide. It is of commercial interest as a precursor to the pigment Prussian blue and, as its potassium salt, an anticaking agent.
Usage examples of "ferrocyanide".
The precipitate contains the zinc, which can be dissolved out by boiling with dilute sulphuric acid, and detected by the formation of a white precipitate on the addition of potassic ferrocyanide.
Some of these, ferrocyanide and ferricyanide of potassium for example, have such characteristic properties that the fact that they are cyanides may be overlooked.
If the solution of cyanide of potassium that is used is strong, the greater portion of the ferrocyanide of potassium crystalises in the solution, and may be collected and preserved for use again.
Such pimento, to render it more attractive, is then often artificially coloured with bole or brown ochre, a sophistication which may be detected by boiling for a few seconds with diluted hydrochloric acid, filtering and testing with potassium ferrocyanide.
For example, when a spy writes in iron sulfate, nothing will be visible until it is painted over with a solution of potassium cyanate, when the two chemicals will combine to form ferric ferrocyanide, or Prussian blue, a particularly lovely hue.
While the Bush administration was publicly decrying Hussein's use of chemical weapons on the Kurds, the potassium ferrocyanide was shipped to Iraq to manufacture chemical weapons for Iraq's army, with the full knowledge and complicity of the Bush administration.