Relating to or containing iron and prussic acid (hydrogen cyanide) compounds.
From 'ferro-' (iron) + 'prussic' (from prussic acid). Prussic acid was named by 18th-century chemists because it was discovered in Prussian blue pigment.
The prefix 'ferroprussic' appears in historical chemistry texts describing reactions that created Prussian blue—one of the first synthetic pigments ever discovered, accidentally made in Berlin around 1704.
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