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Potassium Ferricyanide

Potassium Ferricyanide
SKU
RXSOL-60-6126-025
Supply Location::
Locations

Potassium Ferricyanide manufacturer supplier distributor in Mumbai, Kandla, Kolkata, Vizag, Chennai, India, Fujairah, Dubai UAE, Muscat Oman, Kenya Africa. Get the best quality of Potassium Ferricyanide at a competitive price from us. We have ready stock of Potassium Ferricyanide in India, UAE Gulf, Oman, Kenya Africa. Contact us for bulk as well as small orders.


MUSCAT CHEMICAL TAG::
Category

Potassium Ferricyanide laboratory grade manufacturer, supplier and exporter.

Remarks

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.


Ferroxyl indicator is a solution containing potassium hexacyanoferrate(III) and phenolphthalein. It turns blue in the presence of Fe2+ ions, pink in the presence of hydroxide ions, it can be used to detect metal oxidation. It is often used to detect rusting in various situations.

It can be prepared by dissolving 10g sodium chloride and 1g potassium hexacyanoferrate(III) in distilled water, adding 10 cm3 phenolphthalein indicator, then making up to 500 cm3 with distilled water.

Note

IUPAC name  :  Potassium hexacyanoferrate(III)
 
Identifiers
CAS number 13746-66-2 Y
PubChem 26250
RTECS number LJ8225000
 

Properties
Molecular formula C6N6FeK3
Molar mass     329.24 g/mol
Appearance   deep red crystals
Density           1.89 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

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

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.

 

SAFETY :

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


 

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............

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