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Copper(I) Cyanide

Other Names:

Cuprous cyanide

General Information:


CAS Number: 544-92-3

Molecular Wieght: 89.563 g/mol

Appearance: Off-white to pale yellow powder

Chemical Formula: CuCN

Melting Point: 474 C

Common Uses:

Reagent for SNAr reactions where nitrile products are desired

Reagent for Sandmeyer reactions where nitrile products are desired


Copper(I) cyanide is highly toxic. Contact with acids liberates a highly toxic gas.


1) WO2016011390, page 133

2) WO2014201173, page 239

3) Wikipedia: Copper(I) cyanide (link)

4) Copper(I) cyanide (link)