Description

Antimony (III) Oxide is a high-purity, white crystalline powder essential as a flame retardant synergist and a critical opacifying agent. Its primary commercial value lies in its ability to significantly enhance fire safety in plastics and textiles while providing brilliant white color and opacity in ceramics and glass. This compound is a fundamental raw material for manufacturers in the polymer, ceramics, paint, and electronics industries seeking reliable performance and consistent quality.

Application

• Flame Retardant Synergist: Widely used with halogenated compounds (e.g., in PVC, polyolefins, engineering plastics) for wire & cable, electronic housings, and construction materials.
• Ceramics & Glass Opacifier: Imparts a bright white color and opacity in vitreous enamels, glazes, and opal glass.
• Catalyst Production: Serves as a precursor in the manufacture of catalysts for the production of polyethylene terephthalate (PET).
• Pigment Intermediate: Used in the synthesis of yellow pigments (e.g., Naples Yellow) and other inorganic colorants.
• Smoke Suppressant: Employed in certain formulations to reduce smoke generation during combustion.
• Electronic Applications: Used in the production of varistors and other electronic ceramics.
• Flame-Retardant Textiles & Adhesives: Incorporated into coatings and backings for fabrics and adhesives to improve fire resistance.

Basic Information

Product Name	Antimony (III) Oxide
CAS No.	1309-64-4
Molecular Formula	Sb2O3
Molecular Weight	291.52 g/mol
Synonyms	Antimony Trioxide; Diantimony Trioxide; Antimony Sesquioxide; Antimony White; Flowers of Antimony; ATO; CI 77052; Senarmontite; Valentinite
EINECS	215-175-0

Quality Control

Our Antimony (III) Oxide is manufactured under a stringent quality management system. Every batch undergoes comprehensive analytical testing to ensure it meets precise specifications for purity, particle size, and chemical composition. We provide full traceability and Certificates of Analysis (COA) are available for all shipments to guarantee compliance with your technical and regulatory requirements.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, well-ventilated area away from incompatible materials. Keep container tightly sealed when not in use to minimize exposure to moisture.

Specification

Item	Specification
Appearance	White, crystalline powder
Identification (IR)	Conforms
Assay (Sb2O3)	≥ 99.0 %
Lead (Pb)	≤ 0.05 %
Arsenic (As)	≤ 0.01 %
Iron (Fe)	≤ 0.005 %
Particle Size (D50)	1.0 - 3.0 µm (or as specified)
Loss on Drying	≤ 0.5 %

Note: Specifications can be tailored. Please contact us for the detailed technical data sheet of a specific grade.