What is Antimony Trioxide?
Antimony Trioxide
Antimony Trioxide (Sb2O3) fine white oxide powder with grade-dependent particle-size and purity ranges.
Technical owner: Aurexene Materials Engineering Team · Last updated: 2026-06-18
What It Is Not
- Antimony Trioxide is not a standalone universal flame retardant; it is commonly screened as a synergist within a complete flame-retardant formulation.
When Not to Use It
- Do not use Antimony Trioxide when customer, regulatory, exposure, recycling, or brand requirements mandate an antimony-free formulation.
Intrinsic Screening Summary
- Identity screen
- Sb2O3; Fine white oxide powder
- Intrinsic feature
- Grade-dependent particle size, oxide chemistry, and dispersion quality determine whether Sb2O3 can be evaluated for optical response, laser interaction, or host-matrix limits.
- Material-level integration
- Required when the formulation has moisture, dust, regulatory, or handling constraints.
Application Fit
Material Identity & Specification Status
Approved values for Particle size, Purity, and Packaging are not published; confirm them during quotation or sample review.
| Property | Value |
|---|---|
| Composition | Sb2O3 |
| CAS / identity | 1309-64-4 |
| Morphology | Fine white oxide powder |
| Density | 5.2-5.9 g/cm3; crystal form dependent |
| Storage | Dry sealed container |
Why It Works
| Structure | Function | Mechanism |
|---|---|---|
| Sb2O3 inorganic oxide powder | Conditional antimony oxide route for formulation screening when antimony chemistry is acceptable | Grade-dependent particle size, oxide chemistry, and dispersion quality determine whether Sb2O3 can be evaluated for optical response, laser interaction, or host-matrix limits. |
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Technical Guides
| Technical Guide | Summary |
|---|---|
| Aging, Heat, Humidity, Extraction, and Migration Testing for Flame-Retardant Compounds | Aging, Heat, Humidity, Extraction, and Migration Testing for Flame-Retardant Compounds — a method-conditioned engineering guide for Flame Retardants covering structure-function behavior at the material, interface, and finished-system boundary, process limits, validation, and qualification boundaries. |
| Balancing Flame-Retardant Loading with Melt Flow, Strength, Flexibility, and Surface Finish | Balancing Flame-Retardant Loading with Melt Flow, Strength, Flexibility, and Surface Finish — a method-conditioned engineering guide for Flame Retardants covering structure-function behavior at the material, interface, and finished-system boundary, process limits, validation, and qualification boundaries. |
| Catalyst Precipitation, Deposits, Carryover, and Reactor-Fouling Failures | Catalyst Precipitation, Deposits, Carryover, and Reactor-Fouling Failures — a method-conditioned engineering guide for Catalysis covering structure-function behavior at the material, interface, and finished-system boundary, process limits, validation, and qualification boundaries. |
| Catalyst Solubility, Speciation, and Activity in Polyester Reaction Media | Catalyst Solubility, Speciation, and Activity in Polyester Reaction Media — a method-conditioned engineering guide for Catalysis covering structure-function behavior at the material, interface, and finished-system boundary, process limits, validation, and qualification boundaries. |
| Color Shift, Opacity, Bloom, Migration, and Surface-Deposit Failures | Color Shift, Opacity, Bloom, Migration, and Surface-Deposit Failures — a method-conditioned engineering guide for Flame Retardants covering structure-function behavior at the material, interface, and finished-system boundary, process limits, validation, and qualification boundaries. |
Documents & Inquiry
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Technical Data Sheet
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Safety Data Sheet
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Grade, Sample & Qualification Support
The Aurexene Materials Engineering Team can review the required form, host system, formulation or process, target, sample quantity, volume and timeline, and the grade-specific evidence needed before qualification.
Review Lab Capabilities for sample evaluation and qualification support, or Production Capabilities for scale-up, quality, documentation, and supply support.
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