potassium ferrocyanide

American  

noun

Chemistry.

1. a lemon-yellow, crystalline, water-soluble solid, K 4 Fe(CN) 6 ⋅3H 2 O, used chiefly in casehardening alloys having an iron base and in dyeing wool and silk.

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potassium ferrocyanide British  

noun

1. Also called: potassium hexacyanoferrate (II).   yellow prussiate of potash.  a yellow soluble crystalline compound used in case-hardening steel and making dyes and pigments. Formula: K 4 Fe(CN) 6

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Example Sentences

He extensively used potassium ferrocyanide to bleach detail into dark areas.

From Seattle Times • Jan. 20, 2018

He admonished them for sending their spies to a foreign country equipped with “soap made of potassium ferrocyanide or toilet water that contains lead acetate.”

From Scientific American • Apr. 5, 2014

Upon further investigation, however, authorities learned that the chemical appeared to be potassium ferrocyanide, which is not lethal when diluted in water.

From Time Magazine Archive

A spiral of platinum wire is employed as the cathode, and the presence of the metal confirmed for by dissolving it in a little nitric acid, diluting with water and adding potassium ferrocyanide.

From Scientific American Supplement, No. 810, July 11, 1891 by Various

They give a characteristic pale red precipitate with sodium pyrophosphate, soluble in an excess of the precipitant; they also form precipitates on the addition of platinic chloride and potassium ferrocyanide.

From Encyclopaedia Britannica, 11th Edition, Volume 6, Slice 5 "Clervaux" to "Cockade" by Various