⭐ What Is Antimony Trioxide (Sb₂O₃)?

Antimony Trioxide (Sb₂O₃) is a white, fine inorganic powder.
Its primary industrial use is as a synergistic flame-retardant additive.

It is not a strong flame retardant on its own; however, when used together with halogen-based flame retardants, its effectiveness increases significantly.

🔧 What Is Antimony Trioxide Used For?

✔ 1. Flame-Retardant Synergist (Most Important Use)

During combustion, antimony trioxide:

• Reacts with halogens to form antimony halides
• These compounds suppress flames in the gas phase
• Reduce heat release
• Slow or stop flame spread

Therefore, it greatly enhances fire resistance in materials like PVC, rubber, polyurethane, and textiles.

✔ 2. Fire Resistance in Plastics

Commonly used in combination with halogenated flame retardants (TCPP, TCEP, DBDPE, etc.) in:

• PVC
• ABS
• PE / PP
• Rubber formulations

✔ 3. Glass & Ceramic Industry

Used as:

• Opacifier
• Whitening agent

in:

• Optical glass
• Ceramic glazes
• Enamel coatings

✔ 4. Catalyst

Serves as a catalyst or catalyst carrier in certain chemical reactions.

✔ 5. Paints & Coatings

Contributes as:

• Opacity enhancer
• Color stabilizer
• UV stability improver

🎯 Purposes of Antimony Trioxide

• Reduce flame spread
• Enhance performance of halogen-based flame retardants
• Improve fire classification in plastics
• Meet fire safety standards in PVC applications
• Provide flame retardancy in rubber, cable, and textile products

🏭 Industries That Use Antimony Trioxide

• Plastic & PVC manufacturing
• Electrical & electronic components
• Wire & cable insulation
• Polyurethane foam
• Automotive parts
• Textile coatings
• Ceramic & glass industry
• Paints & coatings

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