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red prussiate of potash

potassium ferricyanide

noun, Chemistry
1.
a bright-red, crystalline, water-soluble, poisonous solid, K 3 Fe(CN) 6 , used chiefly in the manufacture of pigments, as Prussian blue, and of paper, especially blueprint paper.
Also called red prussiate of potash.
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Based on the Random House Dictionary, © Random House, Inc. 2014.
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