ATO
| STRUCTURE | NUMBER |
| Sb2O3 content 99.8% Min |
1309-64-4 |
TDS OF ATO
| Appearance | White powder |
| Average grain diameter | 0.6-1.2 μm |
| Whiteness | 96 Min |
| Antimony trioxide (Sb2O3) | 99.8% Min |
| As | 0.0380% Max. |
| Pb | 0.0480% Max. |
| Fe | 0.0015% Max. |
| Cu | 0.0016% Max. |
| Se | 0.0020% Max. |
| Cd | 0.0010% Max. |
General & Use
Antimony Trioxide (99.8%) has good particle size distribution with low lead (Pb) content. It is good to be used as synergist with halogen flame retardant in most of plastics.
Packaging
25kg bag, 1000kg jumbo bag/pallet, Other packing will be available by customers’ requests.
Frequently Asked Questions
What is Antimony Trioxide?
Antimony Trioxide (ATO) is an inorganic flame-retardant synergist (not a flame retardant on its own). Its bromine content is 99.8% min.
What is the CAS number and formula of Antimony Trioxide?
Antimony Trioxide (ATO) has the CAS number 1309-64-4 and the chemical formula Sb2O3.
What is Antimony Trioxide used for?
Antimony Trioxide is used for as a synergist in virtually all halogen-flame-retarded plastics, textiles, rubber and coatings, cutting the amount of flame retardant needed.
How does Antimony Trioxide work?
Antimony trioxide reacts with halogenated flame retardants during combustion to form antimony halides, which greatly enhance gas-phase flame inhibition and let you use less halogenated retardant.
Which materials is Antimony Trioxide compatible with?
Virtually all halogen-flame-retarded plastics, textiles, rubber and paints/coatings.
Is Antimony Trioxide brominated or halogen-free / is it regulatory compliant?
ATO is an inorganic synergist, not a halogenated compound; purity is 99.8% Sb2O3 minimum. Handle per the SDS; REACH documentation available on request.
What is the typical dosage or concentration of Antimony Trioxide?
Usually added at ~2-6%, in roughly a 1:3 ratio with the halogenated flame retardant.
How should Antimony Trioxide be stored and handled?
Store in a cool, dry, well-ventilated place away from heat, ignition sources and direct sunlight, in sealed original packaging and away from strong oxidisers. Refer to the SDS for full handling guidance.
What packaging and minimum order quantity does Haiwang offer for Antimony Trioxide?
Antimony Trioxide is supplied in bulk, typically as 25 kg bags or 500/1000 kg jumbo bags on pallets. Shandong Haiwang Chemical accommodates flexible MOQs for trial and full container-load orders – contact us for current options.
Is Haiwang a manufacturer, and can it export Antimony Trioxide?
Yes. Shandong Haiwang Chemical is a manufacturer (not a trader) and exports Antimony Trioxide worldwide. Technical data sheets, COA and samples are available on request; contact the sales team for a quotation and lead time.
What does Antimony Trioxide look like?
Antimony Trioxide is supplied as a white fine powder.
What is the purity or specification of Antimony Trioxide?
Typical specification: ≥99.8% Sb2O3. A Certificate of Analysis is provided with each shipment.
Is Antimony Trioxide soluble in water?
Antimony Trioxide is insoluble in water; soluble in strong acids and alkalis.
How thermally stable is Antimony Trioxide?
Antimony Trioxide offers a melting point of about 656°C.
What is the shelf life of Antimony Trioxide?
Stored sealed in a cool, dry place, Antimony Trioxide has a shelf life of around 2–3 years.
What safety precautions are needed when handling Antimony Trioxide?
Antimony trioxide dust should be handled with care — use appropriate PPE (gloves, goggles, dust mask), avoid inhalation, and follow the SDS.
Which synergist or co-additives are recommended with Antimony Trioxide?
Antimony Trioxide is typically used with halogenated flame retardants (ATO is itself the synergist).
What are the advantages of Antimony Trioxide over alternatives?
Antimony Trioxide is a highly effective synergist that sharply reduces the total flame-retardant loading required.
What certifications and documents can Haiwang provide for Antimony Trioxide?
Shandong Haiwang Chemical can provide REACH and RoHS documentation, third-party SGS test reports, a Certificate of Analysis (COA) and Safety Data Sheet (SDS), and manufactures under an ISO 9001 quality system.
What are the lead time, shipping and payment terms for Antimony Trioxide?
Samples of Antimony Trioxide are usually available within a few days, and bulk lead time is typically 1–2 weeks depending on volume. Haiwang exports worldwide (FOB China ports, or CIF and other Incoterms on request) with flexible terms such as T/T or L/C — contact the sales team for a quotation, HS code and current lead time.
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