Synthesis of potassium ferricyanide

Preparation of potassium ferricyanide

Preparation of potassium ferricyanide

Preparation of potassium ferricyanide

A solution of 100 g potassium ferrocyanide in 1000 ml of water, is saturated with chlorine, with frequent stirring, until the solution exhibits a fine deep red color. The reaction is complete when a sample produces no longer a blue precipitate in a solution of ferric chloride, but imparts a brownish tint to it. The solution is evaporated to 1/3 of its weight, and left to cool to room temperature and crystallize. The crystals are collected by filtration and the mother liquor upon further evaporation yields a second crop of potassium ferricyanide. The obtained crude potassium ferricyanide is purified by dissolving in 3 parts of water, then the solution is filtered if necessary and evaporated to half its volume. After cooling the crystals are collected by filtration and the purity tested as already remarked; it must produce neither a blue precipitate nor a blue color in a solution of ferric chloride.

Laboratory manual of inorganic preparations, by H. T. Vulte, 59, 1895





InChI Key


Canonical SMILES


MeSH Synonyms

K3Fe(CN)6, potassium ferricyanide, potassium hexacyanoferrate (III)

Depositor-Supplied Synonyms

Potassium ferricyanide, Red prussiate, Potassium ferricyanate, Tripotassium hexacyanoferrate, Potassium cyanoferrate, Iron potassium cyanide, Tripotassium ferriccyanide, Tripotassium iron hexacyanide, Tripotassium ferric hexacyanide, CCRIS 5559, Tripotassium hexacyanoferrate(3-), EINECS 237-323-3, AI3-09090, Ferrate(3-), hexakis(cyano-C), tripotassium, FERRATE(3-), HEXACYANO-, TRIPOTASSIUM, Potassium hexacyanoferrate(III), Ferrate(3-), hexakis(cyano-C)-, tripotassium, (OC-6-11)-, Ferrate(3-), hexakis(cyano-kappaC)-, tripotassium, (OC-6-11)-, Potassium hexacyanoferrate(III) solution, rotes Blutlaugensalz, (3)aN feminineNI, Kaliumhexazyanoferrat(III), tripotassium hexacyanidoferrate, K3[Fe(CN)6], 31253_RIEDEL, 34272_RIEDEL, 455946_ALDRICH, IuCe>> (1/4)O, P8131_SIAL, 34272_FLUKA, 60299_FLUKA, 60299_SIGMA, CHEBI:30060, potassium hexacyanidoferrate(3-), tripotassium hexacyanoferrate III, potassium hexacyanidoferrate(III), 31253_SIAL, POTASSIUM FERRICYANIDE, ACS, 244023_SIAL, 393517_SIAL, ACN-S002453, tripotassium ion hexacyanoferrate III, LS-2109, BP-30096, M844, FT-0673983, I14-94684, Ferrate(3-), hexakis(cyano-kappaC)-, potassium (1:3), (OC-6-11)-, 2002-18-8, 409-16-5

Removed Synonyms

K3Fe(CN)6, potassium hexacyanoferrate (III), CID26250, 13746-66-2, C028033, Ferrate(3-), hexakis(cyano-.kappa.C)-, potassium (1:3), (OC-6-11)-

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  1. cuaco

    hello i just want to know how many militers of chlorine do i need to the synthesis “preparation of potassium ferricyanide” i`ve all the materials thank you very much

    1. Post author

      According to the procedure you have to use the excess of chlorine gas (not liquid!!!) in order to saturate the solution. The saturation is complete when the reaction solution exhibits a fine deep red color.

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