Cupric cyanide Property

Melting point:

decomposes [CRC10]

Boiling point:

41°C (estimate)

solubility 

insoluble in H2O; soluble in acid solutions, alkaline solutions

form 

green powder

color 

green

Water Solubility 

insoluble H2O; soluble acids and alkalies [HAW93]

EPA Substance Registry System

Copper cyanide (Cu(CN)2) (14763-77-0)

Safety

RIDADR 

1587

HazardClass 

6.1(a)

PackingGroup 

II

Hazard and Precautionary Statements (GHS)

Cupric cyanide Chemical Properties,Usage,Production

Description

Cuprous cyanide is a white crystalline substance. Cupric cyanide, Cu(CN)2 is a yellowish-green powder which decomposes on heating. Molecularweight =89.56 (cuprous); 115.55 (cupric); Freezing/Melting point =473℃ (in nitrogen) (cuprous cyanide).Hazard Identification (based on NFPA-704 M RatingSystem): Health 3, Flammability 0, Reactivity 0. Insolublein water.

Chemical Properties

Cupric cyanide is a yellowish-green powder which decomposes on heating.

Hazard

Toxic.

Safety Profile

Poison by intraperitoneal route. See also CYANIDE and COPPER COMPOUNDS. Incompatible with magnesium. When heated to decomposition it emits toxic fumes of NOx and CN-.

Potential Exposure

Copper cyanide is used in electroplating copper on iron; and as an insecticide and a catalyst.

First aid

If this chemical gets into the eyes, remove anycontact lenses at once and irrigate immediately for at least15 min, occasionally lifting upper and lower lids. Seek medical attention immediately. If this chemical contacts theskin, remove contaminated clothing and wash immediatelyhis chemical has been inhaled, remove from exposure,begin rescue breathing (using universal precautions, including resuscitation mask) if breathing has stopped and CPR ifheart action has stopped. Transfer promptly to a medicalfacility. When this chemical has been swallowed, get medicalattention. Give large quantities of water and inducevomiting. Do not make an unconscious person vomit.

storage

Color Code—Blue: Health Hazard/Poison: Storein a secure poison location. Prior to working with coppercyanide you should be trained on its proper handling andstorage. Copper cyanide must be stored to avoid contactwith chemically active metals (such as potassium, sodium,magnesium, and zinc) since violent reactions occur. Storein tightly closed containers in a cool, well-ventilated areaaway from acetylene gas.

Shipping

Copper cyanide must carry a “POISONOUS/TOXIC MATERIALS” label. It is classified by DOT inHazard Class 6.1 and Packing Group II.

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.