Potassium ferrocyanide

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Specification

Chemical formula: K4 (Fe (CN) 6) * 3H2O

International name: POTASSIUM FERROCYANIDE

CAS No: 13943-58-3 (Anhydrous); 14459-95-1 (Trihydrate)

Appearance: crystals of lemon yellow

Packing: bags of 25 kg

Storage: Store in a dry, well-ventilated area

Potassium ferrocyanide - a complex compound of ferrous iron K4 [Fe (CN) 6], there is usually a trihydrate K4 [Fe (CN) 6] · 3H2O. Potassium ferrocyanide - light yellow crystals with tetragonal lattice. Soluble in water, practically insoluble in ether, ethanol, pyridine, aniline, ethyl acetate. Potassium geksatsianoferroat diamagnetic.

The trivial name "yellow blood salt" came from the fact that it previously obtained by fusing waste from slaughterhouses (eg blood) with potash and iron filings. This, as well as yellow crystals, led to the title compound.

Receiving
Currently Potassium ferrocyanide (Geksatsianoferratt (II), potassium ferricyanide, potassium, potassium geksatsianoferroat) obtained from industrial waste mass (containing cyanides) after gas cleaning gas plants; this mixture was treated with a suspension of Ca (OH) 2, and the filtrate containing Ca2 [Fe (CN) 6] is processed by sequential addition of initially KCl, and then K2CO3.
It can also be produced by the interaction of FeS suspension with an aqueous solution of KCN.

Application
Potassium is used geksatsianoferroat
• the manufacture of pigments,
• dyeing silk,
• in the production of cyanide, iron,
• in the production of colored paper,
• as a component inhibiting coatings
• cyanidation steels for the isolation and disposal of radioactive cesium and others.
• in analytical chemistry as a reagent for the detection of some cations
• in the food industry, potassium ferrocyanide is registered as a food additive E536, prevents caking and balling, for example as an additive to salt and other.

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