Shandong Huashang Chemical Co., Ltd. is a high-tech enterprise focused on industry of fine chemicals research and develop, produce and sale. Shandong Huashang Chemical Co., Ltd. is located in Shan Dong Ji Nan China. we have the ability to provide you high quality products. More than 90 % of our products are exported to developed countries and regions such as north America, Europe, Japan, South Korea and the Middle East.
1. Basic Information
Name: Antimony Mercury Oxide
Alias: Mercury pyroantimonate, Red mercury, Oxystybate
CAS No.: 20720-76-7
Molecular Formula: Sb2Hg2O7
Molecular Weight: 756.80
2. Physical and Chemical Properties
Physical Properties
- Appearance: Cherry-red crystalline solid/powder; high-purity grade shows semi-liquid viscous form under room temperature
- Odor: Metallic faint mercury odor
- Solubility: Insoluble in water, ethanol and all common organic solvents; reacts slowly with dilute strong acid to release mercury ions
- Density: 9.5–10.5 g/cm3
- Melting Point: Decomposes at about 700 °C without stable melting point
- Hygroscopicity: Slightly hygroscopic, adsorbs trace moisture in humid air
- Crystal Structure: Orthorhombic pyroantimonate crystal lattice, composed of Hg2+ and Sb2O74- pyroantimonate groups
Chemical Properties
- Molecular structure: Inorganic double oxide salt formed by Hg cation and pyroantimonate anion Sb2O74-
- Acid decomposition: Reacts with hydrochloric acid, sulfuric acid to generate soluble mercury salts, antimony salts and oxygen
- Thermal decomposition: Decomposes above 700 °C into mercury oxide, antimony trioxide and oxygen gas
- Redox characteristic: Mercury ion inside can be reduced to elemental mercury by strong reducing agents; antimony(V) can be reduced to Sb(III)
- Photostability: Sensitive to strong ultraviolet light; long-term light exposure fades red color and precipitates mercury suboxide
- Compatibility: Incompatible with reducing agents, strong acids, ammonia water and alkaline sulfide solutions
3. Main Application Fields
1. Special Laboratory Research Reagent (Core Application)
- Standard reference substance for mercury-antimony heavy metal co-detection in environmental soil and water samples
- Substrate material for nuclear physics laboratory neutron release experimental research
- Raw material for synthesis of high-purity antimony-mercury functional inorganic crystals
2. Military & Aerospace Special Intermediate
Special high-density inorganic raw material for military signal device and rocket ignition auxiliary components
3. Rare Metal Functional Material Precursor
Doping precursor for high-density scintillation crystal and infrared optical glass manufacturing
4. Mineral Exploration Auxiliary Reagent
Trace heavy metal indicator reagent for underground mineral prospecting testing
4. Quality Specification Table
| Test Item | Standard Index |
| CAS Number | 20720-76-7 |
| Molecular Formula | Sb2Hg2O7 |
| Molecular Weight | 756.80 |
| Appearance | Cherry red crystalline solid |
| Total Purity | Industrial Grade ≥99.0%; High-purity Lab Grade ≥99.99% |
| Water Content (KF) | ≤0.15% |
| Mercury Impurity (Free Hg) | ≤10 ppm |
| Heavy Metals (Pb, As) | ≤5 ppm |
| Packaging | Sealed metal tank lined with PE film, nitrogen-filled vacuum aluminum foil inner bag |
| Storage Condition | Hermetic, light-proof, cool dry warehouse below 20 °C; isolate acid, reducing substances and air |
| Transportation Requirement | Highly toxic heavy metal inorganic solid, Class 6.1 toxic goods sealed dedicated transport |
| Shelf Life | 18 months under intact nitrogen-filled sealed packaging |
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