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Ferrous ferricyanide পটাসিয়াম ফেরিক্যানায়েড পশমের রঙে ব্যবহৃত হয় বলেও জানা যায়। এই যৌগটি ল্যাবরেটরি রিএজেন্ট হিসাবেও ব্যবহৃত হয়। অনেক জৈব প্রতিক্রিয়া এই যৌগকে একটি হালকা অক্সিডাইজিং এজেন্ট হিসাবে নিয়োগ করে। এটি পেইন্টস, বার্ণিশ এবং মুদ্রণের কালি তৈরির ক্ষেত্রে রঙ্গক হিসাবে ব্যাপকভাবে ব্যবহৃত হয়।
Ferrocyanide is the name of the anion [Fe(CN)6]4−. Salts of this coordination complex give yellow solutions. It is usually available as the salt potassium ferrocyanide, which has the formula K4Fe(CN)6. [Fe(CN)6]4− is a diamagnetic species, featuring low-spin iron(II) center in an octahedral ligand environment. Although many salts of cyanide are highly toxic, ferro- and ferricyanides are less toxic because they tend not to release free cyanide.[1] It is of commercial interest as a precursor to the pigment Prussian blue and, as its potassium salt, an anticaking agent.
Ferrocyanide and its oxidized product ferricyanide cannot freely pass through the plasma membrane. For this reason ferrocyanide has been used as a probe of extracellular electron acceptor in the study of redox reactions in cells. Ferricyanide is consumed in the process, thus any increase in ferrocyanide can be attributed to secretions of reductants or transplasma membrane electron transport activity.
Nickel ferrocyanide (Ni2Fe(CN)6) is also used as catalyst in electro-oxidation (anodic oxidation) of urea.[4] Aspirational applications range from hydrogen production for cleaner energy with lower CO2 emission to wastewater treatment.
Ferrocyanide is also studied as an electrolyte in flow batteries.
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