Description

Mercuric Sulfate (CAS No. 7783-35-9), also known as Mercury(II) sulfate, is an inorganic compound with the molecular formula HgO₄S. This high-purity reagent is widely utilized in analytical chemistry and industrial processes due to its strong oxidizing properties. It appears as a white crystalline solid or powder, highly soluble in sulfuric acid but sparingly soluble in water. Mercuric sulfate is commonly employed as a catalyst in organic synthesis and as a reagent in chemical analysis, particularly in the determination of COD (Chemical Oxygen Demand) in water samples. Proper handling is essential due to its toxicity and potential environmental hazards. Store in a cool, dry place away from incompatible substances.

Properties

• CAS Number: 7783-35-9
• Complexity: 62.2
• IUPAC Name: mercuric;sulfate
• InChI: InChI=1S/Hg.H2O4S/c;1-5(2,3)4/h;(H2,1,2,3,4)/q+2;/p-2
• InChI Key: DOBUSJIVSSJEDA-UHFFFAOYSA-L
• Exact Mass: 297.922373
• Molecular Formula: HgO4S
• Molecular Weight: 296.66
• SMILES: [O-]S(=O)(=O)[O-].[Hg+2]
• Topological: 88.6
• Monoisotopic Mass: 297.922373
• Physical Description: Mercuric sulfate appears as odorless white granules or crystalline powder. Denser than water. It is toxic by inhalation and by ingestion. It is used in medicine, for gold and silver extraction, and to make other mercury compounds.
• Color/Form: White granules or crystalline powder
• Odor: Odorless
• Solubility: Sol in hydrochloric acid, hot dil sulfuric acid, concentrated sodium chloride
• Density: 6.47 at 68 °F – Denser than water; will sink
• Synonyms: Mercury(II) sulfate, 7783-35-9, MERCURIC SULFATE, Mercury bisulfate, Mercury disulfate, mercury sulfate, Mercuric sulphate, Mercury persulfate, Sulfate mercurique, Mercury sulfate (HgSO4), Mercury(II) sulfate (1:1), Mercury(II) sulphate, HSDB 1247, UNII-J4L3PPG58I, EINECS 231-992-5, J4L3PPG58I, MERCURIUS SULPHURICUS, DTXSID7064819, MERCURY SULPHATE (HGSO4), MERCURY(II) SULPHATE (1:1), Mercuric bisulfate, BURNING DIARRHEA, MERCURY BISULPHATE, DTXCID8048020, MERCURIC SULFATE, (SOLID), MERCURY (II) SULFATE (1:1), 231-992-5, mercurysulfate, Mercury sulphate, MFCD00011047, Sulfuric acid, mercury(2+) salt (1:1), Mercuric bisulphate, Mercury bisulphates, Sulfate mercurique [French], Mercurous bisulphate, Mercuric Sulfate; Mercury Bisulfate; Mercury(II) Sulfate;, mercury-sulfate, Quecksilbersulfat, solfato di mercurio, sulfato de mercurio, mercury (II) sulfate, MERCURIC SULFATE [MI], SCHEMBL387908, Mercury(II) sulfate ACS grade, MERCURIC SULFATE [HSDB], MERCURIC SULFATE [WHO-DD], MERCURIUS SULPHURICUS [HPUS], AKOS015902447, FM46999, NS00080943, F21252

Application

Mercuric sulfate is primarily used as a catalyst in the oxidation of organic compounds, particularly in the Kjeldahl method for nitrogen determination. It also serves as a key reagent in COD testing for wastewater analysis. Additionally, it finds application in the synthesis of organic mercury compounds and in certain electrochemical processes.

Safety and Hazards

GHS Hazard Statements

• H301: Toxic if swallowed [Danger Acute toxicity, oral]
• H311: Toxic in contact with skin [Danger Acute toxicity, dermal]
• H317: May cause an allergic skin reaction [Warning Sensitization, Skin]
• H370: Causes damage to organs [Danger Specific target organ toxicity, single exposure]
• H372: Causes damage to organs through prolonged or repeated exposure [Danger Specific target organ toxicity, repeated exposure]
• H400: Very toxic to aquatic life [Warning Hazardous to the aquatic environment, acute hazard]
• H410: Very toxic to aquatic life with long lasting effects [Warning Hazardous to the aquatic environment, long-term hazard]

Precautionary Statements

• P260, P261, P262, P264, P270, P272, P273, P280, P301+P316, P302+P352, P308+P316, P316, P319, P321, P330, P333+P317, P361+P364, P362+P364, P391, P405, and P501

Hazard Classes and Categories

• Acute toxicity – Category 3
• Acute toxicity – Category 3
• Skin sensitization – Category 1
• Specific target organ toxicity – Single exposure – Category 1
• Specific target organ toxicity – Repeated exposure – Category 1
• Hazardous to the aquatic environment – Category 1
• Hazardous to the aquatic environment – Category 1

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