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Merck
CN

61176

Copper(I) cyanide

purum p.a., ≥99.0% (KT)

Synonym(s):

Cuprous cyanide

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About This Item

Linear Formula:
CuCN
CAS Number:
544-92-3
Molecular Weight:
89.56
UNSPSC Code:
12352300
NACRES:
NA.21
PubChem Substance ID:
329759378
EC Number:
208-883-6
Beilstein/REAXYS Number:
3587244
MDL number:
MFCD00010975

Key Documents

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InChI key

DULSAGLWMRMKCQ-UHFFFAOYSA-N

InChI

1S/CN.Cu/c1-2;

SMILES string

[Cu]C#N

grade

purum p.a.

assay

≥99.0% (KT)

form

powder

mp

474 °C (lit.)

density

2.92 g/mL at 25 °C (lit.)

anion traces

chloride (Cl-): ≤5000 mg/kg, sulfate (SO42-): ≤100 mg/kg

cation traces

Ca: ≤50 mg/kg, Cd: ≤50 mg/kg, Co: ≤50 mg/kg, Fe: ≤50 mg/kg, K: ≤100 mg/kg, Na: ≤2000 mg/kg, Ni: ≤50 mg/kg, Pb: ≤50 mg/kg, Zn: ≤100 mg/kg

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General description

Copper(I) cyanide is a copper salt containing cyanide (a potential ligand). It can be prepared by reacting copper vapor with cyanogen (NCCN) in vapor phase. It forms novel diamine complexes by reacting with various diamine ligands via “thiosulfate-assisted” synthesis method. It affords crystalline complexes by reaction with thiourea ligands.

Application

Copper(I) cyanide may be used in the preparation of copper(I) cyanide salt (K3Cu(CN)4).

signalword

Danger

Hazard Classifications

Acute Tox. 1 Dermal - Acute Tox. 2 Inhalation - Acute Tox. 2 Oral - Aquatic Acute 1 - Aquatic Chronic 1 - STOT RE 2 Oral

target_organs

Liver,spleen,Bone marrow

supp_hazards

EUH032

Storage Class

6.1B - Non-combustible acute toxic Cat. 1 and 2 / very toxic hazardous materials

wgk

WGK 3

flash_point_f

Not applicable

flash_point_c

Not applicable

Regulatory Information

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Virender K Sharma et al.
Environmental science & technology, 39(10), 3849-3854 (2005-06-15)
Copper(Il) cyanide (Cu(CN)4(3-)) in the gold mine industry presentsthe biggest concern in cyanide management because it is much more stable than free cyanide. Cu(CN)4(3-) is highlytoxic to aquatic life; therefore, environmentally friendly techniques are required for the removal of Cu(CN)4(3-)
Fred B. Stocker et al.
Inorganic chemistry, 35(11), 3145-3153 (1996-05-22)
The syntheses and crystal structures of the first cyanide, sulfur mixed ligand copper(I) complexes are reported. The first complex of the family was discovered when (CuCN)(3)(C(6)H(12)N(4))(2) (1) (C(6)H(12)N(4) = hexamethylenetetramine) was treated with aqueous thiourea. The sulfur ligands include thiourea
Douglas B Grotjahn et al.
Journal of the American Chemical Society, 124(20), 5895-5901 (2002-05-16)
Copper(I) cyanide is an important reagent in organic, organometallic, and supramolecular chemistry because of both the copper center and the versatile cyanide ligand. Solid-phase CuCN and many of its derivatives show oligomeric or polymeric structures, a trait shared by other
Fred B. Stocker et al.
Inorganic chemistry, 38(5), 984-991 (2001-10-24)
A new synthetic procedure developed recently in our laboratories has made possible the synthesis of variety of new complexes of CuCN with diamines. Synthesis was effected by adding the ligand to a solution of CuCN in aqueous sodium thiosulfate. This

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