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Sodium Pyroantimonate
High-Purity Clarifying Agent for Glass and Flame-Retardant Applications
Sodium pyroantimonate is mainly used as clarifying agent for picture tube glass, optical glass and other glass, also used in enamel, ceramics and flame retardant industries.
Product Overview
Sodium Pyroantimonate, also known as Disodium dihydrogen pyroantimonate, is a hydrated antimony salt commonly used in solar glass, cathode ray tubes (CRT), optical glass, and advanced ceramics. Its strong decolorizing and clarifying effects eliminate bubbles and iron tint in molten glass, significantly improving transparency and strength.
It also acts as a whitening agent in enamels and ceramic glazes, delivering uniform opacity and color fidelity. In flame-retardant formulations, it can partially substitute antimony trioxide, offering cost-effective performance.
Key Features
Superior Clarity Effect in optical, ultra-clear, and solar glass.
High Antimony Content supports efficient flame retardancy and whiteness.
Excellent Dispersibility in ceramic, enamel, and polymer matrices.
Multi-functional: acts as clarifier, opacifier, or flame retardant depending on formulation.
Stable under High Temperatures, ideal for melting and sintering environments.
Applications
Glass Clarification Agent
Enhances transparency and gloss of glass, improving quality.
Enamel Opacifier
Improves uniformity and gloss in ceramic and enamel production.
Flame Retardant Additive
Increases fire resistance in plastics, rubber, and textiles.
Ceramics Stabilizer
Enhances gloss and surface quality of ceramics and porcelain.
Glass Clarification Agent
Enhances transparency and gloss of glass, improving quality.
Enamel Opacifier
Improves uniformity and gloss in ceramic and enamel production.
Flame Retardant Additive
Increases fire resistance in plastics, rubber, and textiles.
Ceramics Stabilizer
Enhances gloss and surface quality of ceramics and porcelain.
Parameter indicators
| Category | Item | Chemical Composition (%) |
|---|---|---|
| Exterior | White Crystalline Particles | |
| Sb₂O₃ | Antimony trioxide | 58.40 ± 0.80 |
| Na₂O | Sodium oxide | 12.5 ± 0.5 |
| Sb³⁺ | Antimony (III) | 0.10 – 0.30 |
| Fe₂O₃ | Iron (III) oxide | 0.005 – 0.03 |
| CuO | Copper(II) oxide | 0.005 – 0.05 |
| As₂O₃ | Arsenic (III) oxide | ≤ 0.05 – 0.2 |
| PbO | Lead(II) oxide | 0.25 – 0.3 |
| Cr₂O₃ | Chromium (III) oxide | 0.005 – 0.010 |
| V₂O₅ | Vanadium pentoxide | 0.050 – 0.080 |
| Moisture | Moisture content | ≤ 0.30 |
| Sieve | % retained on (-80 mesh sieve) | ≥ 99 |
Packaging specifications
- Vacuum packed in aluminum-plastic composite bag, 25kg per bag, one tote per ton.
FAQs for Sodium Pyroantimonate
- What is Sodium Pyroantimonate used for?
Mainly as a clarifying agent in solar and optical glass. It also functions as an opacifier in ceramics and a flame retardant additive. - Is it soluble in water?
It is insoluble in water, but fully dispersible in molten glass or enamel. - Can it replace antimony trioxide in all flame-retardant systems?
It can partially replace Sb₂O₃ in many systems but may not offer the same efficiency in all plastics. - Do you offer custom grades?
We can adjust particle size, moisture level, or packaging format upon request. - Is it REACH compliant?
Yes, our Sodium Pyroantimonate is REACH pre-registered and RoHS compliant. Full documentation is provided.
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