cuprous cyanide

Copper(I) cyanide

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Copper(I) cyanide (CuCN), also copper cyanide, cuprous cyanide, or cupricin is a white to cream colored or sometimes greenish powdery solid that is insoluble in water. Its chemical formula is . It is a poison that reacts violently with magnesium. When heated to decomposition, it emits very toxic fumes containing hydrogen cyanide, but it is not flammable itself.

Cuprous cyanide was used as a catalyst in polymerizations, in electroplating of copper and iron, and as insecticide, fungicide, and biocide in marine paints.

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