China Factory Supply Antimony Trioxide 1309-64-4 High Purity 99.5% Sb2o3 Powder

• Customization: Available
• CAS No.: 1309-64-4
• Formula: O3sb2
• Model NO.: antimony trioxide
• EINECS: 215-175-0
• Classification: Antimony Trioxide
• Grade Standard: Industrial Grade
• Kind: Acidic Oxide
• Quality: First Class
• Transport Package: Bags
• Specification: 25kg/Bag
• Trademark: Sinobio
• Origin: China
• Production Capacity: 50000kg/Month

Product Description

Product Description

Antimony Trioxide is a white crystalline powder widely used as a flame retardant synergist, particularly in combination with halogenated compounds for plastics, rubber, and textiles. With high purity (typically ≥99.5%) and excellent thermal stability, it effectively enhances fire resistance in materials like PVC, ABS, and electrical cables. Beyond flame retardancy, it serves as a catalyst in PET resin production and a clarifying agent in glass manufacturing. Our industrial-grade Sb2O3 meets international standards, including REACH and RoHS compliance, and is available in optimized particle sizes for superior dispersion. Proper handling is required as it is classified under UN3077 for transport.

 

Property	Specification	Remarks
Chemical Formula	Sb2O3	Two polymorphs: senarmontite & valentinite
Molecular Weight	291.52 g/mol
Appearance	White crystalline powder	Odorless
Purity	≥99.5% (Industrial Grade)	≥99.8% (Electronics Grade) available
Density	5.2 g/cm³	Higher than most metal oxides
Melting Point	656°C	Decomposes at ~1425°C
Solubility	Insoluble in water	Soluble in concentrated acids/alkalis
Refractive Index	2.087 (senarmontite)	Optical applications
Thermal Conductivity	0.18 W/(m·K)	Low heat transfer
pH (10% slurry)	6.5-7.5	Neutral in aqueous systems

 

Application

 

1. Flame Retardancy

   • Synergist for halogen-based flame retardants in:
     ✓ Plastics (PVC, PP, ABS)
     ✓ Rubber & textiles
     ✓ Electrical cable coatings

2. Catalyst

   • PET resin polymerization

   • Glass decolorization (removes green tint)

3. Specialty Uses

   • Opacifier in ceramics/glazes

   • Precursor for antimony metal production

Packaging & Shipping

• 1.25kg woven bags with PE liner

• 2.1MT big bags (palletized)

Why Choose Us

• Low Heavy Metals: ≤50ppm As/Pb (meets RoHS & REACH)

• Controlled Particle Size: D50 1.2-2.5μm (optimized for dispersion)

• Global Compliance: EU REACH registered, TSCA listed

Company Profile

Dalian Sinobio Chemistry Co.,Ltd was established in 2011 and located in beautiful costal city .We focus on fungicide and water treatment's production and export over 12 years.
Sinobio is a group company who has 2 production sites in China: One is in Jiangxi province which produce fungicide such as lsothiazolinon,BIT,Zinc Pyrithione ,etc.Our products can be widely used in the fields of oil-field water injection, pulp and paper making,water treatment,marine paint, wood, plastic leather,paint coating,cosmetics,personal care products, textiles, fiber, building materials,etc. for sterilization,corrosion prevention and mildew prevention.In particular, it has been widely recognized in the application of sterilization,algae killing,scale inhibition and corrosion inhibition of circulating cooling water in petrochemical, power metallurgy and other industrial fields.
The other one was located in Gansu province which produce water treatment chemicals such as ATMP, HEDP,THPS,TXP etc .Our company has realized the research and development, production and sales of products and provided a series of services such as water treatment engineering solutions. The products are widely used in electric power,chemical industry, metallurgy, textile,paper making, washing, building mate- rials and other fields.
All these products are exported to Europe,America,Russia,Southeast Asia and other parts of the world, and have won the praise of custom.
SINOBIO Warmly welcome customers from at home and abroad to cooperate with us for common success.

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