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Send EmailPotassium Silver Cyanide, Potassium Cyanoargentate, Potassium Dicyanoargentate, Silver Potassium Cyanide, 506-61-6
| Parameter | Description |
|---|---|
| Chemical Name | Potassium dicyanoargentate(I) |
| Other Names | Potassium silver cyanide, Potassium cyanoargentate, Silver potassium cyanide |
| CAS Number | 506-61-6 |
| EC Number (EINECS) | 208-047-0 |
| Chemical Formula | KAg(CN)₂ |
| Molecular Weight | 199.00 g/mol |
| Chemical Class | Inorganic cyanide complex salt / Transition metal cyanide |
| Appearance | White crystalline solid or powder |
| Odor | Faint almond-like odor (cyanide ion) |
| Density | ~3.0 g/cm³ |
| Melting Point | ~300 °C (decomposes) |
CHEMICAL STRUCTURE AND DESCRIPTION:
Potassium Silver Cyanide (KAg(CN)₂) is a complex salt consisting of a potassium cation (K⁺) and a dicyanoargentate anion ([Ag(CN)₂]⁻). In this anion, a silver ion (Ag⁺) is coordinated by two cyanide ligands (CN⁻) in a linear configuration. This complex structure is more stable than free cyanide ions but remains extremely toxic. It is used in electroplating (silver plating baths), in electronic and precision engineering applications, and in metal surface treatment. Due to the presence of both cyanide and silver, it has high toxicity.
Structural Features:
Linear [Ag(CN)₂]⁻ complex anion
Silver ion in +1 oxidation state
Two cyanide ligands
Soluble in water
Hygroscopic
| Property | Value |
|---|---|
| Chemical Formula | KAg(CN)₂ |
| Molecular Weight | 199.00 g/mol |
| Appearance | White crystalline solid or powder |
| Odor | Faint almond-like odor |
| Density | ~3.0 g/cm³ |
| Melting Point | ~300 °C (decomposes) |
| Solubility in Water | Soluble |
| Solubility in Organic Solvents | Slightly soluble |
| Hygroscopicity | Hygroscopic |
| Solvent | Solubility |
|---|---|
| Water | Soluble |
| Organic Solvents | Slightly soluble |
| Acids | Reacts (releases HCN gas) |
| Sector | Application |
|---|---|
| Electroplating | Silver source in silver plating baths |
| Electronics | Precision engineering coatings |
| Metal Surface Treatment | Metal surface cleaning and protection |
| Photography | Photographic chemicals |
| Chemical Synthesis | Intermediate for silver compounds |
| Parameter | Specification |
|---|---|
| Purity (KAg(CN)₂) | ≥ 98.0% |
| Appearance | White crystalline solid or powder |
| Silver Content (Ag) | ~54-56% |
| Cyanide Content (CN) | ~28-30% |
| Insoluble Matter | ≤ 0.01% |
| Other Metals (Cu, Zn) | ≤ 0.001% |
| Moisture | ≤ 0.5% |
| Parameter | Information |
|---|---|
| Storage Conditions | Cool, dry, well-ventilated area |
| Storage Temperature | 15-25°C |
| Keep Away From | Acids, moisture, oxidizers, food and feed |
| Shelf Life | 12-24 months (under proper storage) |
| Packaging | Tightly closed plastic or glass containers |
| UN Number | 1588 (Cyanides, inorganic, solid, n.o.s.) |
| Hazard Class | 6.1 (Toxic substances) |
| Packing Group | I |
Handling Notes:
NEVER mix with acids (HCN gas risk)
Use only in well-ventilated areas
Avoid skin and eye contact
Hygroscopic; protect from moisture
Emergency equipment and cyanide antidote must be available
| Parameter | Value |
|---|---|
| GHS Classification | GHS06 (Skull and Crossbones), GHS08 (Health Hazard), GHS09 (Environment) |
| Signal Word | Danger |
| Hazard Statements | H300 (Fatal if swallowed), H310 (Fatal in contact with skin), H330 (Fatal if inhaled), H373 (May cause organ damage through prolonged/repeated exposure), H410 (Very toxic to aquatic life) |
| Precautionary Statements | P260, P262, P264, P270, P271, P280, P284, P301+P310, P302+P352, P304+P340, P310, P361, P363, P403+P233, P405, P501 |
| UN Number | 1588 |
| Hazard Class | 6.1 (Toxic substances) |
| Packing Group | I |
| Toxicity | Fatal if swallowed, inhaled, or absorbed through skin |
| Exposure Routes | Inhalation, ingestion, skin contact |
| Symptoms | Dizziness, nausea, breathing difficulty, loss of consciousness, death |
| Target Organs | Brain, heart, respiratory system, central nervous system |
| Antidote | Hydroxocobalamin (B12a), sodium thiosulfate |
| Ecotoxicity | Very toxic to aquatic life |
Personal Protective Equipment:
Chemical-resistant gloves
Full-face mask or safety goggles
Protective clothing
Respiratory protection (SCBA or suitable filter mask)
Adequate ventilation must be provided
Cyanide antidote (hydroxocobalamin) must be available
| Exposure Route | Action |
|---|---|
| Inhalation | Move to fresh air. If breathing stopped, perform artificial respiration. Administer oxygen. SEEK IMMEDIATE medical attention. |
| Skin Contact | Remove contaminated clothing immediately. Wash with plenty of water for at least 15 minutes. SEEK IMMEDIATE medical attention. |
| Eye Contact | Rinse with plenty of water for at least 15 minutes. SEEK IMMEDIATE medical attention. |
| Ingestion | Do NOT induce vomiting. If conscious, give plenty of water or milk. SEEK IMMEDIATE medical attention. Antidote administration required. |
ANTIDOTE INFORMATION:
Hydroxocobalamin (B12a) – 5 g IV
Sodium thiosulfate – 12.5 g IV
DO NOT DELAY medical treatment
| Parameter | Information |
|---|---|
| Ecotoxicity | Very toxic to aquatic organisms |
| Bioaccumulation | Cyanide and silver compounds accumulate in the environment |
| Environmental Impact | Must be prevented from entering water and soil sources |
| Waste Management | Cyanide and silver-containing waste must be processed at specialized disposal facilities |
| Parameter | Information |
|---|---|
| UN Number | 1588 |
| Hazard Class | 6.1 (Toxic substances) |
| Packing Group | I |
| Proper Shipping Name | Cyanides, inorganic, solid, n.o.s. (Potassium silver cyanide) |
| Marine Pollutant | Yes |
| ADR/RID Label | 6.1 |
| Region | Status |
|---|---|
| EU | REACH registered; Strictly controlled |
| Turkey (KKDİK) | Mandatory compliance; registration required |
| USA (TSCA) | Listed |
| EINECS | 208-047-0 |
| Customs Tariff Code | 2837.20.00.00.11 |
SUMMARY:
Potassium Silver Cyanide (KAg(CN)₂, CAS 506-61-6) is a white crystalline solid with a molecular weight of 199.00 g/mol and density of approximately 3.0 g/cm³. It is soluble in water and hygroscopic. It is classified as UN 1588, Class 6.1, Packing Group I.
Its most important applications include use in electroplating (silver plating baths), in electronic and precision engineering applications, and in metal surface treatment.
EXTREMELY TOXIC. Fatal if swallowed, inhaled, or absorbed through skin. Inhibits cellular respiration. Very toxic to aquatic life. Storage should be in cool, dry, well-ventilated areas, in tightly closed containers, away from acids and moisture.
Key Properties:
| Property | Value |
|---|---|
| Formula | KAg(CN)₂ |
| CAS No | 506-61-6 |
| Molecular Weight | 199.00 g/mol |
| Appearance | White crystalline/powder |
| Water Solubility | Soluble |
| UN No | 1588 |
| Hazard Class | 6.1 (Toxic) |
| Packing Group | I |
CRITICAL WARNINGS:
Extreme Toxicity: Cyanide ion is extremely toxic. Fatal following ingestion, inhalation, or skin absorption. IMMEDIATE medical attention is essential.
Acid Reaction: Contact with acids releases HCN GAS. NEVER mix with or store near acids.
Silver Toxicity: Silver compounds are also toxic. Chronic exposure may cause argyria (silver accumulation).
Storage: Tightly closed, locked, restricted access, cool, dry, well-ventilated. Away from acids.
Protective Equipment: Full PPE (gloves, goggles, respirator, protective clothing) mandatory. Cyanide antidote must be available.
Waste Management: Cyanide and silver-containing waste must be processed at specialized disposal facilities.
Regulatory: Subject to strict regulatory controls. Special permits may be required for import, export, and use.
Important Disclaimer: This Technical Data Sheet (TDS) is for informational purposes only. The information provided is based on available data and is believed to be accurate. However, the user is solely responsible for determining the suitability of the product for their specific applications and for complying with all applicable regulations and safety requirements. For complete safety, handling, storage, and regulatory compliance information, always refer to the official Safety Data Sheet (SDS/MSDS) provided by the manufacturer/supplier. Potassium Silver Cyanide is EXTREMELY TOXIC and must only be used under controlled conditions with proper training and protective equipment. In case of exposure, seek IMMEDIATE medical attention.