Mercury(II) sulfate
Mercury(II) sulfate (CAS 7783-35-9), with the molecular formula HgSO₄ and a molar mass of 296.65 g/mol, is a white crystalline solid. It is a key inorganic salt of mercury, often utilised as a catalyst in organic synthesis and in analytical chemistry. Its distinct chemical properties make it valuable in specific industrial processes and research applications requiring a source of divalent mercury.
- IUPAC
- Mercuric sulfate

Catalysis in Organic Synthesis
Mercury(II) sulfate serves as an effective catalyst in various organic transformations, notably in the hydration of alkynes to form carbonyl compounds. Its application is crucial in specific synthetic routes requiring precise control over reaction pathways.
Analytical Reagent
In analytical chemistry, Mercury(II) sulfate is employed in certain qualitative and quantitative tests. It can be used in specific titrations or as a reagent for detecting other substances due to its defined chemical reactivity.
Chemical Synthesis Intermediate
This compound acts as a precursor or intermediate in the synthesis of other mercury-containing compounds. Its use is confined to controlled laboratory and industrial settings for the preparation of specialised chemicals.
| Molecular weight | 296.65 |
|---|---|
| Linear formula | HgSO4 |
| Assay | ≥99.0% |
| Grade | ACS reagent |



Hazard statements
- H300Fatal if swallowed
- H310Fatal in contact with skin
- H330Fatal if inhaled
- 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 1645 6.1 / PGII |
| Water hazard class (WGK, DE) | 3 |
| Hazard codes (EU) | T+,N |
| Risk statements (R) | 26/27/28-33-50/53 |
| Safety statements (S) | 13-28-45-60-61 |
| Cation traces | Fe: ≤50 mg/kg |
| Anion traces | chloride (Cl-): ≤50 mg/kg |
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) sulfate used for?
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Mercury(II) sulfate (CAS 7783-35-9) is primarily used as a catalyst in organic synthesis, for example in the hydration of alkynes, and as an analytical reagent. It is also used as an intermediate in the synthesis of other mercury compounds.
What is the CAS number and chemical formula for Mercury(II) sulfate?
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The CAS number for Mercury(II) sulfate is 7783-35-9, and its chemical formula is HgSO₄.
What grade and purity does Tech Serve Solutions supply?
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Tech Serve Solutions supplies Mercury(II) sulfate in ACS reagent grade, with an assay of ≥99.0%. We do not represent this product as meeting USP, BP, or EP pharmacopoeial standards.
How should Mercury(II) sulfate be handled safely?
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Mercury(II) sulfate is highly toxic and an environmental hazard. Handle with extreme caution using appropriate personal protective equipment, including gloves, eye protection, and a suitable respirator. Avoid dust formation and release into the environment; it is classified as Danger with hazards H300, H310, H330, H373, and H410.
Is Mercury(II) sulfate a controlled substance?
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While not explicitly listed as a controlled substance in all jurisdictions, Mercury(II) sulfate is a highly toxic and environmentally hazardous material, subject to strict regulations regarding its handling, transport, and disposal.
How is Mercury(II) sulfate packed and shipped?
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Mercury(II) sulfate is packed and shipped according to stringent international regulations for hazardous materials, identified as UN 1645, Class 6.1, Packing Group II, with hazard N (Toxic) and environmental hazard symbols.
How can I request a quote or sample?
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To request a quote or a sample of Mercury(II) sulfate, please contact our sales department directly through our website or by phone, providing your specific requirements and shipping details.
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