Silver cyanide
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Description
White or gray, granular powder that darkens on exposure to light. Silver cyanide is used primarily for silver plating. Some chemical tarnish removal methods use dilute cyanide solutions for dipping followed by a water rinse. Cyanide solutions will react with silver to produce silver cyanide residues which are highly toxic.
Risks
- Highly toxic by ingestion, inhalation or skin absorption.
- ThermoFisher: SDS
Physical and Chemical Properties
Soluble in solutions of ammonium hydroxide, nitric acid, potassium cyanide, potassium ferricyanide and sodium thiosulfate. Insoluble in water.
| Composition | AgCN |
|---|---|
| CAS | 506-64-9 |
| Melting Point | 320 C (dec) |
| Density | 3.95 g/ml |
| Molecular Weight | mol. wt. = 133.89 |
| Refractive Index | 1.685, 1.94 |
Resources and Citations
- D. Strahan "Treatment of a Silver Dragon for the Removal of Silver Cyanide and Chalconatronite" JAIC, 25: 73-81, 1986.
- Richard S. Lewis, Hawley's Condensed Chemical Dictionary, Van Nostrand Reinhold, New York, 10th ed., 1993
- The Merck Index, Martha Windholz (ed.), Merck Research Labs, Rahway NJ, 10th edition, 1983 Comment: entry 8655
- CRC Handbook of Chemistry and Physics, Robert Weast (ed.), CRC Press, Boca Raton, Florida, v. 61, 1980 Comment: ref. index = 1.685, 1.94