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Sodium ferrocyanide

Sodium ferrocyanide
IUPAC name tetrasodium [hexacyanoferrate(II)]
Other names Yellow Prussiate of soda (YPS), Tetrasodium hexacyanoferrate, Gelbnatron, Ferrocyannatrium
CAS number 13601-19-9
EINECS number 237-081-9
Molecular formula Na4Fe(CN)6
Molar mass 303.91
Appearance yellow crystals
Density 1.458
Boiling point

435 °C

Solubility in water soluble – 18g/100mL
Crystal structure monoclinic
Related Compounds
Other anions Sodium ferricyanide (Red Prussiate of soda)
Except where noted otherwise, data are given for
materials in their standard state
(at 25 °C, 100 kPa)

Infobox disclaimer and references

Sodium ferrocyanide, also known as tetrasodium hexacyanoferrate or sodium hexacyanoferrate (II), is a coordination compound of formula Na4Fe(CN)6 which forms semi-transparent yellow crystals at room temperature, and which decomposes at its boiling point. It is soluble in water and insoluble in alcohol, and the solution can react with acid or photodecompose to release hydrogen cyanide gas.

In its hydrous form, Na4Fe(CN)6•10H2O (sodium ferrocyanide decahydrate), it is generally known as yellow prussiate of soda.


As yellow prussiate of soda, it is added to road and food grade salt as an anticaking agent. When combined with iron, it converts to a deep blue pigment which is the main component of Prussian blue. In photography it is used for bleaching, toning and fixing. It is used as a stabilizer for the coating on welding rods. In the petroleum industry it is used for removal of mercaptans.

This article is licensed under the GNU Free Documentation License. It uses material from the Wikipedia article "Sodium_ferrocyanide". A list of authors is available in Wikipedia.
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