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: Bismuth Oxide
Alias: Bismuth trioxide, Dibismuth trioxide
CAS No.: 1304-76-3
Molecular Formula: Bi2O3
Molecular Weight: 465.96
2. Physical and Chemical Properties
Physical Properties
- Appearance: Pale yellow to orange crystalline powder
- Odor: Odorless
- Solubility: Insoluble in water and ethanol; soluble in strong inorganic acids to generate bismuth salts
- Melting Point: 824 °C
- Density: 8.9 g/cm3
- Hygroscopicity: Non-hygroscopic under normal ambient conditions
- Refractory property: High melting point, good high-temperature stability
Chemical Properties
- Molecular structure: Ionic metal oxide composed of Bi3+ cations and O2- anions
- Alkaline oxide characteristic: Reacts with hydrochloric acid, nitric acid, sulfuric acid to form corresponding bismuth salt and water
- Carbonation: Slowly absorbs carbon dioxide in moist air to produce bismuth subcarbonate
- Thermal stability: Stable below 800 °C; no decomposition at melting point
- Redox property: Can be reduced to elemental bismuth by carbon, hydrogen and other strong reducing agents at high temperature
- Compatibility: Compatible with neutral inorganic raw materials; incompatible with strong acid, acidic salts and acidic aqueous environments
3. Main Application Fields
1. Electronic & Ceramic Raw Material (Core Application)
- Doping additive for varistors, electronic ceramics and piezoelectric materials to improve electrical performance
- Raw material for high-temperature ceramic glaze, yellow-orange inorganic pigment
2. Pharmaceutical & Cosmetic Excipient
- Raw material for gastric protective bismuth preparations with astringent and anti-ulcer effects
- Non-toxic pearlescent additive and skin soothing auxiliary for topical skincare products
3. Chemical Industry Intermediate
- Precursor for synthesizing various bismuth salts such as bismuth nitrate, bismuth citrate
- Catalyst for organic synthesis and petrochemical processing
4. Flame Retardant & Nuclear Industry Auxiliary
Environment-friendly heavy metal flame retardant substitute for lead oxide; radiation shielding filler for special materials
4. Quality Specification Table
| Test Item | Standard Index |
| CAS Number | 1304-76-3 |
| Molecular Formula | Bi2O3 |
| Molecular Weight | 465.96 |
| Appearance | Pale yellow fine powder |
| Bi2O3 Content | Industrial Grade ≥99.0%; Pharma Grade ≥99.9% |
| Water Insoluble Impurity | ≤0.10% |
| Loss on Drying | ≤0.20% |
| Heavy Metals (Pb) | ≤10 ppm |
| Arsenic (As) | ≤2 ppm |
| Packaging | 25kg PE lined fiber drum, inner nitrogen-sealed aluminum foil bag |
| Storage Condition | Hermetic dry warehouse below 25 °C; isolate humid air and acidic substances |
| Transportation Requirement | Inorganic bismuth oxide powder, dust-proof sealed packaging |
| Shelf Life | 36 months under intact sealed packaging |
Safety Warning
Low acute toxicity, but long-term inhalation of dust may accumulate in human body and damage digestive system. Wear dust mask and chemical-resistant gloves during operation. Avoid direct mixing with strong acid to prevent heat release and toxic bismuth salt mist. Waste residues shall be recycled as heavy metal inorganic waste.
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