Bismuth(III) Oxide
High-purity Bismuth(III) Oxide (Bi2O3, CAS 1304-76-3), 99.9–99.999%, supplied wholesale by Zyntex. For zinc oxide varistors, lead-free glasses and glazes, catalysts, dental cements and pyrotechnics. CoA and SDS with every lot.
Description
Bismuth(III) Oxide Product Overview
Bismuth(III) oxide (Bi2O3) is a yellow, heavy powder that is insoluble in water but dissolves in acids. It melts at about 817°C and, unlike lead oxide, has low toxicity, which makes it a popular lead-free alternative.
In addition, electronic ceramic producers use it as a key additive in zinc oxide varistors, which protect circuits against voltage surges, often together with Zinc oxide. Glass and enamel producers also use it in low-melting, lead-free glasses, glazes and sealing glasses. It also serves as a raw material for other bismuth compounds, such as Bismuth subnitrate and Bismuth (III) oxychloride.
In addition, bismuth oxide finds use in catalysts, as a radiopaque filler in dental cements, and in pyrotechnics, where it creates the typical crackling effect. Its high-temperature delta phase is also one of the best oxide-ion conductors, so researchers study it for fuel cells and sensors.
Key Applications of Bismuth(III) Oxide
Typical uses include, for example:
⚡ Varistors
Additive in zinc oxide varistor ceramics.
🏺 Lead-Free Glass
Component of low-melting glasses as well as glazes.
🦷 Dental Materials
Radiopaque filler in dental cements.
🎆 Pyrotechnics
Crackling effect in fireworks.
Bismuth(III) Oxide Technical Specifications
| Parameter | Standard Value |
|---|---|
| Product Name | Bismuth(III) Oxide |
| CAS Number | 1304-76-3 |
| Molecular Formula / Weight | Bi2O3 / 465.96 g/mol |
| Assay / Purity | 99.9% – 99.999% |
| Appearance | Yellow powder |
| Documents | CoA as well as SDS with every lot |
⚠️ Safety & Handling: Low acute toxicity, but dust may irritate the eyes and respiratory tract. Avoid dust formation and also wear dust protection and eye protection. Store in tightly closed containers in a dry place, so that the material stays in good condition. Always consult the Safety Data Sheet (SDS), because it contains the full classification and handling instructions.
Frequently Asked Questions
Why is bismuth oxide used instead of lead oxide?
Because it has similar glass-forming properties but much lower toxicity, it serves as a lead-free alternative in glasses and glazes.
Which purities do you supply?
Purities from 99.9% for ceramics up to 99.999% for electronics as well as research are available.
How can I get a price and documents?
Prices depend on quantity, packaging and destination, so please contact us with your required volume. We then send a quotation together with the CoA and SDS.
