Molekula
Bismuth trioxide 99.5%
Supplying 4,500+ customers in over 80 countries
ISO 9001:2015 & ISO 14001:2015 certified · Supplying laboratories and industry since 2000 · Listed pack sizes are a starting point — we manufacture, source and repack to the quantity you need
Bismuth trioxide (Bi2O3) is a stable, yellowish-white powder widely used in ceramics, cosmetics, and as a pigment in glass manufacturing due to its high refractive index and thermal stability. It also serves as a flame retardant and in electronics as a semiconductor material. This high-purity bismuth trioxide meets 99.5% minimum assay standards, with a CAS number of 1304-76-3 and molecular weight of 465.96. It requires no special storage conditions and carries no signal word under standard handling. Molekula supplies Bismuth trioxide from research to bulk quantities with full documentation and ISO 9001:2015 traceability.
Example image for illustration only. Other packaging and pack sizes are available.
Pricing & pack sizes
Pack sizes & pricing
Pricing on request — packs available from research to bulk quantities.
Need a different quantity or pack?
Tell us how much you need and when — drums, IBCs, sacks or a one-off bulk lot. We'll manufacture or source it and come back with a price.
Prices exclude VAT/sales tax and shipping.
Specifications
| Property | Value |
|---|---|
| Appearance | Solid |
| Identification | Conforms to reference |
| Assay | 99.5% |
Storage & handling
| Property | Value |
|---|---|
| Storage Temperature | Ambient |
| Acidity | Neutral |
Identification
| Property | Value |
|---|---|
| SKU | 90025423 |
| CAS Number | 1304-76-3 |
| IUPAC Name | oxo(oxobismuthanyloxy)bismuthane |
| EC Number | 215-134-7 |
| Molecular Formula | Bi2O3 |
| Molecular Weight | 465.96 |
| Exact Mass | 465.9455 |
| SMILES | O=[Bi]O[Bi]=O |
| InChIKey | WMWLMWRWZQELOS-UHFFFAOYSA-N |
| InChI | InChI=1S/2Bi.3O |
| PubChem CID | 14776 |
| REACH Code | Y113 |
| TSCA Listed | Yes |
| HTS Code | 2825909000 |
| Tariff Code | 2825908590 |
Safety & GHS
Precautionary statements
- P264 Wash thoroughly after handling
- P280 Wear protective gloves/protective clothing/eye protection/face protection
Documents
Safety Data Sheets (SDS)
Available in English, French, German, Italian, Portuguese, Spanish.
Certificate of Analysis (CoA) by batch
Enter a lot or batch number to retrieve the CoA for that specific batch. We can generate one from spec data if no PDF is on file.
Synonyms
- Bismuth oxide (Bi2O3)
- Bismuth oxide (BiO1.5)
- Bismuth sesquioxide (Bi2O3)
- Bismuth(3+) oxide
- Bismutum-oxydatum
- C.I. 77160
- Dibismoxane-1,3-dione
- Dibismuth trioxide
- oxo(oxobismuthanyloxy)bismuthane
- Wimut(III)-oxid
Frequently asked questions
What is bismuth trioxide (Bi₂O₃) commonly used for?
Bismuth trioxide is primarily used as a pigment in ceramics and glass, as a catalyst in chemical reactions, and in the production of bismuth-based alloys and pharmaceuticals.
What is the molecular formula and molecular weight of bismuth trioxide?
The molecular formula is **Bi₂O₃**, and the molecular weight is **465.96 g/mol**.
How should bismuth trioxide be stored?
Store bismuth trioxide in a cool, dry place at ambient temperature, away from moisture and incompatible substances.
What purity grade is available for bismuth trioxide from Molekula?
Molekula supplies bismuth trioxide at a **99.5% purity grade**.
Can Molekula supply bismuth trioxide in bulk quantities?
Yes, Molekula can provide bismuth trioxide in bulk, with quantities tailored to your specific requirements.
What documentation comes with an order of bismuth trioxide?
Each order includes a **Certificate of Analysis (CoA)**, Material Safety Data Sheet (MSDS), and a product specification sheet.
Ready to order or need a custom pack?
Tell us the product, grade, and quantity — Molekula usually responds within one working day with pricing and lead time.