| Identification | More | [Name]
COPPER(I) CYANIDE | [CAS]
544-92-3 | [Synonyms]
COPPER(+1)CYANIDE
COPPER CYANIDE
COPPER(I) CYANIDE
CUPRICIN
CUPROUS CYANIDE
ai3-28745
Copper cyanide (Cu(CN))
coppercyanide(cu(cn))
Cu(CN)
rcrawastenumberp029
COPPER(I) CYANIDE, 99.99%
CopperCyanideTech.
Copper(I)cyanide,99%
Copper(I) cyanide, extra pure, 99%
CUPROUSCYANIDE,POWDER,PURIFIED
CUCURBITACINA
Coprous cyanide
Copper(i) cyanide, 99%, extra pure
Cyanocopper(I) | [EINECS(EC#)]
208-883-6 | [Molecular Formula]
CCuN | [MDL Number]
MFCD00010975 | [Molecular Weight]
89.56 | [MOL File]
544-92-3.mol |
| Chemical Properties | Back Directory | [Appearance]
Cuprous cyanide is a white crystalline substance. | [Melting point ]
474 °C(lit.)
| [Boiling point ]
decomposes [STR93] | [density ]
2.92 g/mL at 25 °C(lit.)
| [vapor pressure ]
0Pa at 25℃ | [storage temp. ]
Poison room | [solubility ]
insoluble in H2O, ethanol; soluble in KCN solution | [form ]
Powder | [color ]
White-beige to greenish | [Specific Gravity]
2.92 | [Stability:]
Stable. Incompatible with acids, bases, magnesium. Reacts violently with oxidizing agents, nitrates. Reaction with acid releases highly toxic gas (HCN). | [Water Solubility ]
Practically insoluble in water and alcohol. Soluble in ammonium hydroxide, aqueous ammonia, pyridine and N-methylpyrrolidone. | [Sensitive ]
air sensitive | [Merck ]
14,2661 | [BRN ]
3587244 | [Solubility Product Constant (Ksp)]
pKsp: 19.46 | [Exposure limits]
TLV-TWA 1 mg Cu/m3 (ACGIH). | [LogP]
-1.49 at 25℃ | [CAS DataBase Reference]
544-92-3(CAS DataBase Reference) | [EPA Substance Registry System]
Copper(I) cyanide (544-92-3) |
| Hazard Information | Back Directory | [Chemical Properties]
Cuprous cyanide is a white crystalline substance. | [Description]
off-white to green powder. Insoluble in water,soluble in HCI, Nl40H, and potassium cyanide. Used in Sandmeyer's reaction to synthesize aryl cyanides. Toxic by skin absorption, through open wounds, by ingestion, and by inhalation of hydrogen cyanide that arises from slight decomposition. Produces toxic oxides of nitrogen in fires.
| [General Description]
A green powder. Insoluble in water. Toxic by skin absorption, through open wounds, by ingestion, and by inhalation of hydrogen cyanide that arises from slight decomposition. Produces toxic oxides of nitrogen in fires. | [Reactivity Profile]
COPPER CYANIDE(544-92-3) is decomposed by acids to give off hydrogen cyanide, a flammable poisonous gas. Tends to explosive instability. Capable of violent oxidation under certain condition: fusion with metal chlorates, perchlorates, nitrates or nitrites can cause explosions [Bretherick, 1979 p. 101]. Reacts with incandescence with magnesium [Mellor, 1940, Vol. 4, 271]. | [Air & Water Reactions]
Insoluble in water. | [Hazard]
Poison. | [Health Hazard]
Following severe exposure to dust, symptoms of cyanide poisoning may develop (see ingestion). Ingestion causes anxiety, confusion, dizziness, sudden loss of consciousness, odor of bitter almonds on breath or in vomitus, rapid weak pulse, convulsions, and paralysis. Contact with eyes causes irritation. | [Potential Exposure]
Copper cyanide is used in electroplating copper on iron; and as an insecticide and a catalyst. | [Fire Hazard]
Special Hazards of Combustion Products: Toxic hydrogen cyanide gas may form in fires. | [First aid]
If this chemical gets into the eyes, remove any contact lenses at once and irrigate immediately for at least 15 minutes, occasionally lifting upper and lower lids. Seek medical attention immediately. If this chemical contacts the skin, remove contaminated clothing and wash immediately with soap and water. Seek Medical attention immediately. If this chemical has been inhaled, remove from exposure, begin rescue breathing (using universal precautions, including resuscitation mask) if breathing has stopped and CPR if heart action has stopped. Transfer promptly to a medical facility. When this chemical has been swallowed, get medical attention. Give large quantities of water and induce vomiting. Do not make an unconscious person vomit. | [Shipping]
UN1587 Copper cyanide, Hazard Class: 6.1; Labels: 6.1-Poisonous materials | [Incompatibilities]
Contact with heat, strong acids (HCl, H2SO4, HNO3) forms deadly hydrogen cyanide gas. May release hydrogen cyanide on contact with moisture. Incompatible with strong oxidizers (chlorates, nitrates, peroxides, permanganates, perchlorates, chlorine, bromine, fluorine, etc.); contact may cause fires or explosions. Keep away from alkaline materials, strong bases, strong acids, oxoacids, epoxides, acetylene gas, and chemically active metals, such as potassium, sodium, magnesium, and zinc. | [Waste Disposal]
Copper-containing soluble wastes can be concentrated through the use of ion exchange, reverse osmosis, or evaporators to the point where copper can be electrolytically removed and sent to a reclaiming firm. If recovery is not feasible, the copper can be precipitated through the use of caustics and the sludge deposited in a chemical waste landfill. Copper-containing wastes can be concentrated to the point where copper can be electrolytically removed and reclaimed. If recovery is not feasible, the copper can be precipitated by alkali; the cyanide destroyed by alkaline oxidation yielding a sludge which can be sent to a chemical waste landfill. In accordance with 40CFR165, follow recommendations for the disposal of pesticides and pesticide containers. Must be disposed properly by following package label directions or by contacting your local or federal environmental control agency, or by contacting your regional EPA office. | [Physical properties]
Cream-colored powder or green orthorhombic or red monoclinic crystals; density 2.90 g/cm3; melts at 474°C; decomposes at higher temperatures; practically insoluble in water, ethanol, and cold dilute acids; dissolves in ammonium hydroxide and potassium cyanide solutions. | [Purification Methods]
Wash the cyanide thoroughly with boiling H2O, then with EtOH. Dry it at 100o to a fine soft powder. It dissolves in excess alkali cyanide solutions to form the very soluble complex ion Cu(CN)43-. [Bassett & Corbett J Chem Soc 125 1660 1924, Barber J Chem Soc 79 1943.] | [Flammability and Explosibility]
Notclassified | [storage]
Color Code—Blue: Health Hazard/Poison: Storein a secure poison location. Prior to working with thischemical you should be trained on its proper handling andstorage. Store in tightly closed containers in a cool, wellventilated area away from strong oxidizers. |
| Safety Data | Back Directory | [Hazard Codes ]
T+,N,T | [Risk Statements ]
R26/27/28:Very Toxic by inhalation, in contact with skin and if swallowed .
R32:Contact with acids liberates very toxic gas.
R50/53:Very Toxic to aquatic organisms, may cause long-term adverse effects in the aquatic environment . | [Safety Statements ]
S7:Keep container tightly closed .
S28:After contact with skin, wash immediately with plenty of ... (to be specified by the manufacturer) .
S29:Do not empty into drains .
S45:In case of accident or if you feel unwell, seek medical advice immediately (show label where possible) .
S60:This material and/or its container must be disposed of as hazardous waste .
S61:Avoid release to the environment. Refer to special instructions safety data sheet . | [RIDADR ]
UN 1587 6.1/PG 2
| [WGK Germany ]
2
| [RTECS ]
GL7150000
| [F ]
10-23 | [TSCA ]
Yes | [HazardClass ]
6.1 | [PackingGroup ]
II | [HS Code ]
28371990 | [Safety Profile]
A poison. Reacts
violently with magnesium. When heated to
decomposition it emits very toxic CNand
NOx. See also CYANIDE and COPPER
COMPOUNDS. | [Hazardous Substances Data]
544-92-3(Hazardous Substances Data) |
| Questions And Answer | Back Directory | [Chemical Properties]
Copper(I) cyanide, CuCN, [544-92-3], MW 89.56, MP 474°C, d 2.92, is white when pure, but usually available as an off-white or cream-colored powder and is insoluble in water and dilute acids but dissolves in complexing media such as ammonia and alkali cyanide solutions. It is produced by the reaction of sodium cyanide with copper(I) chloride solutions or by the reaction of copper(II) sulfate solutions with alkali cyanide and sodium hydrogen sulfite. It is used extensively in the electroplating industry and as a polymerization catalyst in organic reactions. | [Uses]
Copper(I) cyanide is used in copper plating of nickel, chromium, zinc alloys,
steel, and other metals or alloys. Such copper plating imparts brightness,
smoothness, hardness, and strength. The cyanide solution employed for copper electroplating consists of copper cyanide and sodium cyanide. Other applications of this compound are as an insecticide, a catalyst in polmerization, and
as an antifouling agent in marine paints. | [Preparation]
Copper(I) cyanide is a precipitate obtained by adding potassium cyanide solution to an aqueous solution of Cu2+ salt:
COPPER(I) CYANIDE 2652CuCl2 + 4KCN → 2CuCN + C2N2 + 4KCl
The Cu2+ to CN¯ molar ratio should be 1:2. The precipitate dissolves in an excess of cyanide, forming soluble ions Cu(CN)2¯ , Cu(CN)32¯, and Cu(CN)43¯.
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