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Reference.org
Potassium ferrocyanide
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<p>Potassium hexacyanidoferrate(II) is the <a href="/facts/Inorganic_compound/TfFfzxSz">inorganic compound</a> with formula K4[Fe(CN)6]·3H2O. It is the potassium salt of the <a href="/facts/Complex_(chemistry)/1tCyeQUm">coordination complex</a> [Fe(CN)6]4−. This salt forms lemon-yellow <a href="/facts/Monoclinic/5PCwXvzX">monoclinic</a> <a href="/facts/Crystal/e2R2mk3E">crystals</a>. </p>