Mercury(II) cyanide
Mercury(II) cyanide (CAS 592-04-1, Hg(CN)₂) is a white crystalline solid with a molecular weight of 252.62 g/mol. It is a highly toxic compound known for its solubility in water and ethanol. Historically, it has seen use in electroplating baths and as a biocide. Its significant toxicity necessitates extremely careful handling and specialised applications.
- IUPAC
- Mercuric cyanide

Electroplating
Mercury(II) cyanide has been utilised in specialised electroplating baths, particularly for gilding and as a component in silver plating solutions, contributing to specific surface finishes.
Chemical Reagent
In historical laboratory settings, it served as a reagent in certain organic syntheses and analytical procedures, leveraging the reactivity of the cyanide and mercury ions.
Biocide Applications
Due to its potent toxicity, it has been explored or used in limited capacities as a biocide, though its application is severely restricted by safety and environmental concerns.
| Molecular weight | 252.62 |
|---|---|
| Linear formula | Hg(CN)2 |
| Assay | 99% |
| Form | solid |
| Density | 3.996 g/mL at 25 °C(lit.) |



Hazard statements
- H300Fatal if swallowed
- H373May cause damage to organs through prolonged exposure
- H410Very toxic to aquatic life with long-lasting effects
Precautionary statements
- P260Do not breathe dust, fume, gas, mist, vapours or spray
- P264Wash thoroughly after handling
- P273Avoid release to the environment
- P280Wear protective gloves, clothing and eye/face protection
- P284Wear respiratory protection
- P301IF SWALLOWED
| Protective equipment | dust mask type N95 (US), Eyeshields, Faceshields, Gloves, type P2 (EN 143) respirator cartridges |
|---|---|
| Transport (UN / ADR) | UN 1636 6.1 / PGII |
| Water hazard class (WGK, DE) | 3 |
| Hazard codes (EU) | T+,N |
| Risk statements (R) | 26/27/28-32-50/53 |
| Safety statements (S) | 7-28-29-45-60-61 |
| Supplemental hazards | Contact with acids liberates very toxic gas. |
Hazard information is provided for guidance. Always consult the product Safety Data Sheet (SDS), available on request, before handling.
Documentation
Every batch ships with a Certificate of Analysis covering assay, identity and purity; the grade is confirmed against your enquiry. Safety Data Sheets and technical data sheets are available on request.
Supply & logistics
Samples for technical evaluation; bulk MOQ by grade and packaging. In-stock material ships in 7–10 working days, worldwide, with full export documentation.
What is Mercury(II) cyanide used for?
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Mercury(II) cyanide (CAS 592-04-1) has historical applications in electroplating, as a chemical reagent in certain laboratory syntheses, and has seen limited use as a biocide due to its high toxicity.
What are the CAS number and chemical formula for Mercury(II) cyanide?
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The CAS number for Mercury(II) cyanide is 592-04-1, and its chemical formula is Hg(CN)₂.
What grade and purity does Tech Serve Solutions supply?
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Tech Serve Solutions supplies Mercury(II) cyanide with a purity of 99%. This product is supplied as a technical/research grade material and is not represented as USP, BP, EP, or any other pharmacopoeia grade.
What are the primary safety concerns when handling Mercury(II) cyanide?
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Mercury(II) cyanide is extremely toxic, posing severe hazards through ingestion, skin contact, and inhalation (H300 + H310 + H330). It can cause long-term organ damage (H373) and is very toxic to aquatic life with long-lasting effects (H410). Contact with acids liberates very toxic gas, and stringent safety protocols, including appropriate PPE (respirator, gloves, eye protection), are mandatory.
How is Mercury(II) cyanide packed, shipped, and exported?
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Mercury(II) cyanide is packed and shipped in compliance with stringent international regulations for hazardous materials, including UN 1636, Class 6.1, Packing Group II. Tech Serve Solutions has extensive experience in exporting such sensitive chemicals globally.
How can I request a sample or quote for Mercury(II) cyanide?
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To request a sample or a quotation for Mercury(II) cyanide, please contact our sales team through the website or by phone. Please be prepared to provide your shipping details and intended use for our records.
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