potassium ferricyanide


noun Chemistry.

a bright-red, crystalline, water-soluble, poisonous solid, K3Fe(CN)6, used chiefly in the manufacture of pigments, as Prussian blue, and of paper, especially blueprint paper.

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What does “vacillate” mean?
Also called red prussiate of potash.
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2020