Ferrocyanide

<p>Ferrocyanide is the <a href="/facts/Anion/wrbwhF3z">anion</a> [Fe(<a href="/facts/Cyanide/t0o8FMKI">CN</a>)6]4−. Salts of this <a href="/facts/Coordination_complex/1tCyeQUm">coordination complex</a> give yellow solutions. It is usually available as the salt <a href="/facts/Potassium_ferrocyanide/YpSC26qS">potassium ferrocyanide</a>, which has the formula K4Fe(CN)6. [Fe(CN)6]4− is a <a href="/facts/Diamagnetic/dgFavn9K">diamagnetic</a> species, featuring low-spin iron(II) center in an <a href="/facts/Octahedral_molecular_geometry/bNXLVvks">octahedral ligand environment</a>. Although many salts of <a href="/facts/Cyanide/t0o8FMKI">cyanide</a> are highly toxic, ferro- and <a href="/facts/Ferricyanide/JLsWWvvV">ferricyanides</a> are less toxic because they tend not to release free cyanide. It is of commercial interest as a precursor to the pigment <a href="/facts/Prussian_blue/IV0VooPH">Prussian blue</a> and, as its <a href="/facts/Potassium_ferrocyanide/YpSC26qS">potassium salt</a>, an <a href="/facts/Anticaking_agent/52z1LnGk">anticaking agent</a>.
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Ferrocyanide open-in-new

Ferrocyanide