506-64-9 Usage
Uses
Used in Silver-Plating Industry:
Silver cyanide is used as a silver-plating agent for various applications, including the decoration and protection of objects, as well as the enhancement of electrical conductivity and reflectivity in electronic components.
Used in Chemical Synthesis:
In the chemical industry, silver cyanide was formerly used for the extemporaneous preparation of dilute hydrocyanic acid by treatment with hydrochloric acid (HCl). This application highlights its versatility in chemical reactions and synthesis processes.
Preparation
Silver cyanide is prepared by adding a solution of an alkali cyanide to a solution of silver nitrate:
Ag+ (aq) + CNˉ (aq) → AgCN (s)
Air & Water Reactions
Insoluble in water. Decomposes slowly when moist, giving off hydrogen cyanide, which is toxic by inhalation.
Reactivity Profile
Silver cyanide is very rapidly decomposed by acids giving off hydrogen cyanide, a flammable poison gas. Soluble in aqueous ammonia, dilute boiling nitric acid, aqueous potassium cyanide solution and aqueous sodium thiosulfate solutions. Subject to explosive instability or violent oxidation under certain conditions. Fusion with metal chlorates, perchlorates, nitrates, or nitrites can cause a violent explosion [Bretherick 1979 p. 101]. Fluorine and Silver cyanide react with explosive violence at ordinary temperatures [Mellor 2 Supp. 1:63 1956].
Hazard
Toxic by ingestion or inhalation.
Health Hazard
Highly toxic, may be fatal if inhaled, swallowed or absorbed through skin. Avoid any skin contact. Effects of contact or inhalation may be delayed. Fire may produce irritating, corrosive and/or toxic gases. Runoff from fire control or dilution water may be corrosive and/or toxic and cause pollution.
LD50 oral (rat): 123mg/kg
Fire Hazard
Non-combustible, substance itself does not burn but may decompose upon heating to produce corrosive and/or toxic fumes. Containers may explode when heated. Runoff may pollute waterways.
Flammability and Explosibility
Notclassified
Safety Profile
Deadly poison by ingestion. A skin and severe eye irritant. When heated to decomposition it emits very toxic fumes of CNand NO,. Incompatible with phosphorus tricyanide, fluorine. Used in silver plating. See also SILVER COMPOUNDS and CYANIDE.
Potential Exposure
It is primarily used in silver plating.
Shipping
UN1684 Silver cyanide, Hazard Class: 6.1; Labels: 6.1-Poisonous materials.
Purification Methods
It is a POISONOUS white or grayish white powder. Stir it thoroughly with H2O, filter, wash well with EtOH and dry it in air in the dark. It is very insoluble in H2O (0.000023g in 100mL H2O) but is soluble in HCN or aqueous KCN to form the soluble Ag(CN) 22 complex. [Schnitz-Dumont Chem Ber 72 298 1939, Randall & Halford J Am Chem Soc 52 184 1930.]
Incompatibilities
Acetylene, ammonia, and hydrogen peroxide (H2O2). Contact with moisture, CO2, acid and acid fumes release hydrogen cyanide. Contact with fluorine is violently explosive at normal temperatures. Incompatible with phosphorus cyanide.
Waste Disposal
Consult with environmental regulatory agencies for guidance on acceptable disposal practices. Generators of waste containing this contaminant (≥100 kg/mo) must conform to EPA regulations governing storage, transportation, treatment, and waste disposal
Check Digit Verification of cas no
The CAS Registry Mumber 506-64-9 includes 6 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 3 digits, 5,0 and 6 respectively; the second part has 2 digits, 6 and 4 respectively.
Calculate Digit Verification of CAS Registry Number 506-64:
(5*5)+(4*0)+(3*6)+(2*6)+(1*4)=59
59 % 10 = 9
So 506-64-9 is a valid CAS Registry Number.
InChI:InChI=1/CN.Ag/c1-2;/q-1;+1
506-64-9Relevant articles and documents
Detection of free monomeric silver(I) and gold(I) cyanides, AgCN and AuCN: Microwave spectra and molecular structure
Okabayashi, Toshiaki,Okabayashi, Emi Y.,Koto, Fumi,Ishida, Toshimasa,Tanimoto, Mitsutoshi
, p. 11712 - 11718 (2009)
The chemistry of the group 11 metal cyanide system has been of considerable interest because of the commercial importance of some of the complexes formed in this system. These metal cyanides contain one-dimensional linear -M-CN-M-CN-M- chains in the solid
