Potassium silver cyanide

  • potassium argentocyanide
  • Potassium bis(cyano-c)argentate(1-)
  • Potassium dicyanoargentate
  • Potassium dicyanoargentate(I)
  • Potassium dicyanoargentate(1-)
  • Potassium dicyanoargentate (Kag(Cn)2)
Formula
K2Ag(CN)2
Structure
Description
White crystals.
Uses
In silver plating, as bactericide.

Registry Numbers and Inventories.
CAS
506-61-6
EC (EINECS/ELINCS)
208-047-0
RTECS
TT5775000
RTECS class
Primary Irritant
UN (DOT)
1588
Merck
12,7839
Beilstein/Gmelin
37364 (G)
RCRA
P099
Swiss Giftliste 1
G-8905
Canada DSL/NDSL
DSL
US TSCA
Listed
Austrailia AICS
Listed
New Zealand
Listed
Japan ENCS (MITI)
Listed
Korea ECL
Listed

Properties.
Formula
C2AgKN2
Formula mass
199.00
Melting point, °C
370 - 371
Density
2.36 g/cm3 (20 C)
Solubility in water
soluble
Refractive index
1.485

Hazards and Protection.
Storage
Light sensitive.
Handling
All chemicals should be considered hazardous. Avoid direct physical contact. Use appropriate, approved safety equipment. Untrained individuals should not handle this chemical or its container. Handling should occur in a chemical fume hood.
Protection
Wear appropriate protective gloves, clothing and goggles.
Respirators
Wear positive pressure self-contained breathing apparatus (SCBA).
Small spills/leaks
Avoid inhalation or skin contact. (Non-Specific -- Cyanide, Inorganic, n.o.s.) Do not touch spilled materials; stop leak if you can do so without risk. Use water spray to reduce vapors. Small spills: absorb with sand or other noncombustible absorbent material and place into containers for later disposal. Small dry spills: with clean shovel place material into clean, dry container and cover; move containers from spill area. Large spills: dike far ahead of spill for later disposal.
Stability
Sensitive to light.

Fire.
Fire fighting
(Non-Specific -- Cyanide, Inorganic, n.o.s.) Isolate hazard area and deny entry. Stay upwind; keep out of low areas. Ventilate closed spaces before entering them. Wear positive pressure breathing apparatus and special protective clothing. Fight fire from maximum distance. Dike fire control water for later disposal. Do not scatter the material.(Non-Specific -- Cyanide, Inorganic, n.o.s.) Use dry chemical, carbon dioxide, water spray, or foam for small fire, and water spray, fog, or foam for large fires. Move containers of this material away from fire area if this can be done without risk.
Fire potential
Non-combustible, substance itself does not burn but may decompose upon heating to produce corrosive and/or toxic fumes.
Hazards
When heated to decomposition, potassium silver cyanide emits very toxic fumes of cyanide and nitrogen oxides. Avoid light.
Combustion products
When heated to decomposition it emits very toxic fumes of cn- and nox.

Health.
Exposure limit(s)
IDHL: 25 mg/m3
Poison_Class
1
Exposure effects
Initial presentation of cyanide poisoning may include hyperpnea and rapid breathing. Hypoventilation progressing to apnea may be seen in the later phases and is a major cause of death. Rapid heart rate and elevated blood pressure may be seen. Low heart rate and abnormally low blood pressure are seen in the late phases of cyanide poisoning. Headache, CNS stimulation with anxiety, agitation, and combative behavior, coma, and seizures may be seen. Most victims of acute poisoning either die acutely or fully recover.
   Ingestion
Nausea, vomiting, and abdominal pain may occur, especially after ingestion. Ingestion of cyanide salts can cause irritation or corrosion of the esophageal or gastric mucosa.
   Inhalation
Hyperpnea and tachypnea may be noted initially. Hypoventilation progressing to apnea may be seen in the later phases and is a major cause of death.
   Skin
Potassium silver cyanide is a severe irritant of the skin.
   Eyes
See Inhalation.

First aid
 
   Ingestion
Seek medical assistance.
   Inhalation
Move patient to fresh air. Monitor for respiratory distress. If cough or difficulty breathing develops, evaluate for respiratory tract irritation, bronchitis, or pneumonitis. Administer oxygen and assist ventilation as required. Treat bronchospasm with beta2 agonist and corticosteroid aerosols.
   Skin
Remove contaminated clothing and wash exposed area thoroughly with soap and water. A physician should examine the area if irritation or pain persists. While cyanide can be absorbed through intact skin, most reported cases have involved whole-body immersion in cyanide solutions or large-area burns with molten cyanide solutions.
   Eyes
Immediately flush with running water for at least 20 minutes.

Transport.
UN number
1588
Response guide
Hazard class
6.1
Packing Group
I; II; III
 
USCG CHRIS Code
PSC