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Potassium Ferrocyanide

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Product Delivery Locations: 
Kandla, Gandhidham, Mundra, Sikka, Jamnagar, Surat, Navlakhi, Porbander, Pipava, Dehej, Hazira, Okha, Vadodra, Ahmedabad, Rajkot
Lab Chemical-60
Generic Name: 

Potassium Ferrocyanide

Product Description: 

Potassium Ferricyanide laboratory grade manufacturer, supplier and exporter.

Product Application: 

Potassium ferricyanide is also one of two compounds present in ferroxyl indicator solution (along with phenolphthalein) which turns blue (Prussian blue) in the presence of Fe2+ ions, and which can therefore be used to detect metal oxidation that will lead to rust. It is possible to calculate the number of moles of Fe2+ ions by using a colorimeter, because of the very intense color of Prussian blue Fe4[Fe(CN)6]3.



Potassium ferricyanide has very low toxicity, its main hazard being that it is a mild irritant to the eyes and skin. However, under very strongly acidic conditions, highly toxic hydrogen cyanide gas is evolved, according to the equation:

6 H+ + [Fe(CN)6]3− → 6 HCN + Fe3+[9]

The reaction with hydrochloric acid is as follows:

6 HCl + K3[Fe(CN)6] → 6 HCN + FeCl3 + 3 KCl


Product Procedure: 

You may click here to know more about passivation liquid , other methods for PASSIVATION TEST

Do you know A-A-A methods for Passivation click here............

Product Note: 

IUPAC name  :  Potassium Hexacyanidoferrate(II)
CAS number 13943-58-3 
PubChem 26250
RTECS number LJ8225000

Molecular formula C6N6FeK4
Molar mass     368.35 g/mol
Appearance   deep red crystals
Density           1.85 g/cm3, solid
Melting point   300 °C, 573 K, 572 °F
Boiling point :  decomp.
Solubility in water 330 g/L ("cold water")
464 g/L (20°C)
775 g/L ("hot water")[1]
Solubility slightly soluble in alcohol
soluble in acid
soluble in water

Product Technical Specification: 
Physical state and appearance Solid. (crystalline powder.)
Odor Not available
Taste Not available
Molecular Weight 329.25 g/mole
Color Red
pH (1% soln/water) Not available
Boiling Point Not available
Melting Point Decomposes
Critical Temperature Not available
Specific Gravity 1.85 (Water = 1)
Vapor Pressure Not applicable
Vapor Density Not available
Volatility Not available
Odor Threshold Not available
Water/Oil Dist. Coeff Not available
Ionicity (in Water) Not available
Dispersion Properties See solubility in water
Solubility Soluble in cold water
Stability The product is stable
Instability Temperature Not available
Conditions of Instability Heat, light, incompatible materials
Incompatibility with various substances Reactive with acids
Corrosivity Non-corrosive in presence of glass
Product pack size: 
50 Grams, 100, 500 Gram packet. Also available in 1 Kg, 5 Kg and 25 Kg Export quality packing standard.
Product alias: 
<p> Red prussiate, Prussian red, Potassium hexacyanoferrate(III)</p>

The potassium and sodium ferrocyanides are also used in the purification of tin and the separation of copper from molybdenum ores. Potassium ferrocyanide is used in the production of wine and citric acid.

It can also be used in animal feed.

In the laboratory, potassium ferrocyanide is used to determine the concentration of potassium permanganate, a compound often used in titrations based on redox reactions.

Thus it is used as an identifying reagent for iron in labs.


Detecting free Iron :   Spray the surface with a solution of potassium ferricyanide. If free iron is present, a blue color will appear. This test is extremely sensitive and often gives false positive results, that is, it gives an indication of iron being present when it really is not. The ferroxyl solution must be made fresh each day by addition with Nitric acid. The ferroxyl tests are described in ASTM A380.