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Sodium ferrocyanide is produced industrially from hydrogen cyanide, ferrous chloride, and calcium hydroxide, the combination of which affords Ca 2 [Fe(CN) 6]·11H 2 O.A solution of this salt is then treated with sodium salts to precipitate the mixed calcium-sodium salt CaNa 2 [Fe(CN) 6] 2, which in turn is treated with sodium carbonate to give the tetrasodium salt.
Ferrocyanide is the name of the anion [Fe 6] 4−. Salts of this coordination complex give yellow solutions. It is usually available as the salt potassium ferrocyanide , which has the formula K 4 Fe(CN) 6 .
Activated charcoal, also known as activated carbon, is a medication used to treat poisonings that occurred by mouth. [1] To be effective it must be used within a short time of the poisoning occurring, typically an hour. [1] [2] It does not work for poisonings by cyanide, corrosive agents, iron, lithium, alcohols, or malathion. [2]
Ferrocyanides are used for table salt. [1] The following anticaking agents are listed in order by their number in the Codex Alimentarius by the Food and Agriculture Organization of the UN. 341 tricalcium phosphate; 460(ii) powdered cellulose; 470b magnesium stearate; 500 sodium bicarbonate; 535 sodium ferrocyanide; 536 potassium ferrocyanide
The principal process used to manufacture cyanides is the Andrussow process in which gaseous hydrogen cyanide is produced from methane and ammonia in the presence of oxygen and a platinum catalyst. [21] [22] 2 CH 4 + 2 NH 3 + 3 O 2 → 2 HCN + 6 H 2 O. Sodium cyanide, the precursor to most cyanides, is produced by treating hydrogen cyanide with ...
The safety of sodium ferrocyanide as a food additive was found to be provisionally acceptable by the Committee on Toxicity in 1988. [47] Other anticaking agents sometimes used include tricalcium phosphate , calcium or magnesium carbonates, fatty acid salts ( acid salts ), magnesium oxide , silicon dioxide , calcium silicate , sodium ...
The pigment is used in paints, it became prominent in 19th-century aizuri-e (藍摺り絵) Japanese woodblock prints, and it is the traditional "blue" in technical blueprints. In medicine, orally administered Prussian blue is used as an antidote for certain kinds of heavy metal poisoning, e.g., by thallium(I) and radioactive isotopes of caesium.
Potassium hexacyanidoferrate(II) is used in a mixture with potassium ferricyanide and phosphate buffered solution to provide a buffer for beta-galactosidase, which is used to cleave X-Gal, giving a bright blue visualization where an antibody (or other molecule), conjugated to Beta-gal, has bonded to its target. On reacting with Fe(3) it gives a ...