Important: Safety Warning
This page describes trade processes that use dangerously toxic materials such as cyanide solutions, mercury amalgams, or strong acids. These processes require training, equipment, and precautions far beyond what the text describes.
This information has been left in for historical purposes but should not be acted upon.
Home › Miscellaneous Chemicals › Ferrocyanide of Iron
Ferrocyanide of Iron
This is pure Prussian blue. Dissolve 9 troy ounces ferrocyanide of potassium in 2 pints water, and add it gradually, with stirring, to 1 pint of the solution of tersulphate of iron previously diluted with 1 pint water. Filter the mixture, and wash the precipitate on the filter with boiling water until the washings pass nearly tasteless. Lastly dry it and rub it into powder. (U. S. Ph.) 4168. Solution of Tersulphate of Iron. Take 24 troy ounces sulphuric acid, and 14 troy ounces nitric acid; mix them with pint water in a large capsule, heat to the