3 FeSO₄ + 4 K₃[Fe(CN)₆] → Fe₄[Fe(CN)₆]₃ + 3 K₂SO₄ + 6 KCN

Reactants:

• FeSO₄ – Iron(II) sulphate
  • Other names: Iron(II) sulfate , Ferrous sulfate , Green vitriol ... show moreIron vitriol , Copperas , Melanterite , Szomolnokite , Ferrous sulfate , Iron sulfate (1:1) , Iron(II) sulfate (1:1) , Ferrous sulfate (anhydrous) , Ferrous sulfate (anh.) , Iron(2+) sulfate (anh.) , FeSO4 , Fe(II)SO4 , Ferrous sulfate anhydrous show less
  • Appearance: White crystals (anhydrous) | White-yellow crystals (monohydrate) | Blue-green crystals (heptahydrate)
• K₃[Fe(CN)₆] – Potassium hexacyanoferrate(III)
  • Other names: Potassium ferricyanide , Red prussiate of Potash , Prussian red ... show morePotassium hexacyanoferrate(3-) , Tripotassium hexacyanoferrate , K3[Fe(CN)6] , Red prussiate , Tripotassium hexacyanoferrate (-3) , Potassium cyanoferrate , Potassium ferricyanate , Iron potassium cyanide show less
  • Appearance: Deep red crystals, sometimes small pellets, orange to dark red powder ; Red crystalline powder

Products:

• Fe₄[Fe(CN)₆]₃
• K₂SO₄
  • Names: Potassium sulfate , Potassium sulphate , Dipotassium sulfate ... show moreKaliumsulfat , K2SO4 , Sulfuric acid dipotassium salt show less
  • Appearance: White solid ; Colourless-to-white crystals
• KCN – Potassium cyanide
  • Other names: Potassium cyanide (as CN) , Hydrocyanic acid, potassium salt , Potassium salt of hydrocyanic acid
  • Appearance: White crystalline solid | deliquescent ; Hygroscopic crystals or solid in various forms with characteristic odour. odourless when dry ; White, granular or crystalline solid with a faint, almond-like odor.