1788 J. St. John tr. L. B. Guyton de Morveau et al. Method Chym. Nomencl. 158 Prussiats, salts formed by the union of the prussic acid, or coloring matter of Prussian blue, with different bases. This genus of salts had no name in the old nomenclature.

c1790 tr. A. Lavoisier et al. Tabl. Chem. Nom. in Encycl. Brit. IV. 598 Names newly invented or adopted..Prussiate of potash..Prussiate of iron.

1805 W. Saunders Treat. Mineral Waters (ed. 2) 340 Prussiat of potash instantly produced a blue cloudiness.

1841 T. Thomson in Rep. Brit. Assoc. Advancem. Sci. 1840 Sci. Reports 61 At Campsie alum-works may be seen..the fabrication of prussiate of potash.

1890 Chem. News 15 Aug. 82/1 The cyanised charcoal was..dropped into..water containing powdered spathic iron ore in suspension, by which the cyanides were converted into ferrocyanides or prussiates.

1923 R. A. Clemen Amer. Livestock & Meat Industry v. 133 By 1851, the packers of Cincinnati..were getting some profit from the extraction of prussiate of potash from the hair, hoofs, and offal.

1990 Stud. Conservation 35 96/1 Yellow iron(III) chloride..was then reacted with potassium ferrocyanide (Prussiat of potash) to produce the blue precipitate of ferric ferrocyanide (Prussian blue).

2004 Materials Lett. 58 1913/1 The head face of each ingot was polished and etched in potassium prussiate solution.

1794 R. Kirwan Elements Mineral. (ed. 2) I. 504 They make use of the same sort of Berlin blue in Prussiating their alkali.

1794 R. Kirwan Elements Mineral. (ed. 2) I. 491 The Berlin blue, so I call the Prussian blue of the shops, is not pure Prussiated iron, but a mixture of this with embryon alum.

1806 W. Henry Epitome Chem. (ed. 4) ii. i. 321 The prussiated alkalies also precipitate muriate of alumine.

1842 Philos. Trans. (Royal Soc.) 132 211 Gum-arabic may be added to the prussiated solution, by which it is hindered from spreading unmanageably within the pores of the paper.