Bismuth oxide (Bi₂O₃), also known as bismuth trioxide, bismuth(III) oxide, or bismite, is an inorganic compound that typically appears as a yellow powder or crystalline solid. It is one of the most important bismuth compounds and serves as the primary precursor for a wide range of bismuth-based materials and chemical processes.
Bi₂O₃ is valued for its high refractive index, excellent electrical properties, and chemical stability, making it useful across numerous industries. As the foundational material for most bismuth chemistry, it finds application in:
- Electronic ceramics (e.g., varistors, thermistors)
- Optical materials and specialty glasses
- Catalysts in organic synthesis
- Pigments and coatings
- Pharmaceutical and cosmetic formulations
- Hightemperature superconductors and advanced functional materials
Its versatility and reactivity make bismuth oxide a key ingredient in both traditional industrial processes and emerging hightech applications.
General Properties
| Properties | Value |
| Chemical formula | Bi2O3 |
| CAS Name | 1304-76-3 |
| EC / EINECS Number | 215-134-7 |
| Molar mass | 465.958 g·mol−1 |
| Appearance | Yellow powder |
| Melting point | 817 °C (1,503 °F; 1,090 K) |
| Boiling point | 1,890 °C (3,430 °F; 2,160 K) |
| Density | 8.90 g/cm3, solid |
| Solubility in water | Insoluble |
| Solubility | Insoluble in all solvents |
Product Availability
We provide high-purity Bismuth Oxide (Bi2O3) tailored for semiconductor and industrial requirements.
| Purity | 99.99% – 99.9999% |
| Forms | Powder |
| Particle Sizes | From -50 mesh to -200 mesh |
| Nanoparticle Sizes | From 30 nm to 100nm |
| Package | At request |
If you are in need of any high purity Bismuth Oxide (Bi2O3), please contact our sales team for details at sales@american-gmg.com.