ferrocyanide

(-sīə nīd′, -nid′)

noun

a salt of ferrocyanic acid, HFe(CN), containing the tetravalent negative radical Fe(CN), in which the iron is divalent

See ferrocyanide in American Heritage Dictionary 4

noun
A salt containing the negative tetravalent radical Fe(CN)6, used in making blue pigments, blueprint paper, and ferricyanide.

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