Lead Chromicyanide, Pb₃[Cr(CN)₆]₂

Lead Chromicyanide, Pb₃[Cr(CN)₆]₂.30H₂O, is precipitated on the addition of alcohol to a solution of the basic salt in a limited quantity of dilute sulphuric acid. No precipitate is formed when potassium chromicyanide is added to a solution of lead nitrate, but the basic acetate of lead yields a white precipitate.

The basic compound, Pb₃[Cr(CN)₆]₂.5PbO, is obtained as a yellowish-white amorphous precipitate on adding ammoniacal lead acetate solution to a dilute solution of potassium chromicyanide in absence of carbon dioxide.