Antimony trioxide for compounds: controlled particle size, purity and document readiness.
AHR coordinates lot-specific Sb2O3 requirements for PVC, cable, plastics, rubber, coatings and textile applications. Buyers receive a grade review based on purity, particle-size distribution, whiteness, heavy metals, surface treatment, packaging, CoA, SDS and regulatory documents. No grade or dosage is assumed before the formulation is defined.
Antimony trioxide should be selected by application, not by purity alone. A comparable offer states Sb2O3 purity, individual heavy-metal limits, particle-size distribution, whiteness or color, moisture, bulk behavior, surface treatment, grade identity, packaging, origin, CoA, SDS, regulatory status, sample terms and quotation validity.
What is antimony trioxide, and what is the buyer purchasing?
Antimony trioxide is a white inorganic antimony compound, commonly written as Sb2O3. The commercial product is a controlled powder grade, not simply a chemical formula.
Direct answer
USGS describes antimony trioxide as the most important antimony compound and says it is primarily used in flame-retardant formulations. It is widely used in plastics, rubbers, paints and textiles to help resist flame spread. USGS antimony information.
PubChem describes antimony trioxide as a white crystalline solid and notes that it is insoluble in water. Physical descriptions do not replace a supplier SDS or lot CoA. PubChem compound record.
Who buys antimony trioxide, and what do they actually need?
This page targets formulation and production teams. Their decision is based on dispersion, color, fire performance, compliance and process stability, not ore grade or metal payability.
PVC compounders
Need controlled particle size, dispersion, color, heavy-metal limits and stable performance in rigid or flexible compounds.
Cable compound manufacturers
Need formulation compatibility, reliable dispersion, electrical-property control, smoke and fire-test performance.
Masterbatch producers
Need repeatable powder behavior, concentrated dispersion, low contamination and consistent lot-to-lot color.
Rubber manufacturers
Need compatibility with the curing system, halogen package, pigment load and mechanical-property targets.
Coatings and textiles
Need particle control, color, viscosity impact, coating stability, handling and end-use compliance.
Chemical distributors
Need legal supplier documents, grade traceability, packaging options, shelf-life statement and market-specific compliance.
Which Sb2O3 specifications should a buyer define?
The correct grade depends on the polymer, flame-retardant package, processing route, color target and regulatory market.
| Field | Buyer should define | Supplier should return | Why it matters |
|---|---|---|---|
| Grade identity | Approved grade, application or producer reference. | Exact grade name, producer and current revision. | Different grades may have different particle, surface and impurity controls. |
| Sb2O3 purity | Minimum purity and test method. | Lot result, method, sample ID and CoA. | Purity is necessary but does not predict dispersion or fire performance alone. |
| Heavy metals and impurities | Limits for As, Pb, Fe, Se, Cd, Hg and other controlled elements. | Full agreed panel with units, methods and detection limits. | Impurities affect color, regulation, processing and end-use acceptance. |
| Particle-size distribution | Method and required D10, D50, D90 or D97 values where relevant. | Current laser-diffraction or agreed report with dispersion conditions. | Particle size affects dispersion, dust, surface area and formulation behavior. |
| Whiteness or color | Instrument, geometry, sample preparation and target value. | Lot result under the same method. | Color matters in light PVC, cable, coatings and masterbatch. |
| Moisture and loss on drying | Maximum value and method. | Lot-specific result. | Moisture can affect storage, feeding, agglomeration and processing. |
| Surface treatment | Untreated or named treatment compatible with the formulation. | Treatment identity and declaration. | Treatment can change wetting, dispersion and compatibility. |
| Bulk and handling properties | Feeding, dust, flow and packaging requirements. | Available bulk-density or handling data and packaging format. | Powder behavior affects plant cleanliness and dosing stability. |
| Regulatory documents | Market, application, language and required declarations. | Current grade-specific SDS, TDS, CoA and applicable declarations. | A generic document cannot prove compliance for every grade or market. |
How does antimony trioxide work in halogenated systems?
ATO is usually a synergist, not a complete stand-alone flame-retardant formulation. The polymer system and fire-test target control the result.
Direct answer
The U.S. EPA describes antimony trioxide as a synergist used with halogenated flame retardants. In practice, the antimony and halogen package can form volatile antimony-halogen species in the flame zone, helping interrupt gas-phase combustion reactions. The actual result depends on formulation, processing and test conditions. EPA risk-assessment page.
- Not universal: ATO does not automatically improve every polymer or every flame-retardant chemistry.
- Not a dosage rule: supplier guidance must be confirmed by formulation trials and fire testing.
- Not a compliance claim: passing one formulation or thickness does not prove another application.
- Performance trade-offs: loading can influence color, density, mechanical properties, smoke, cost and processing.
Sales language to avoid: “guarantees flame retardancy,” “non-toxic,” “RoHS certified for all uses,” or “works at 3-5% in every polymer.” Those claims require a defined grade, formulation, market and test evidence.
How should ATO be sold to different manufacturing buyers?
Sell the manufacturing outcome and the evidence needed to reproduce it. Do not lead with “white powder” or one generic purity number.
PVC compounds
“Controlled color and particle-size consistency for repeatable dispersion in your defined PVC flame-retardant package.”
Cable compounds
“A documented Sb2O3 grade reviewed against your polymer, electrical, smoke, fire-test and heavy-metal requirements.”
Masterbatch
“Stable lot-to-lot powder behavior for concentrated dispersion, clean let-down and consistent downstream dosing.”
Rubber
“Application review based on curing chemistry, halogen package, mechanical targets, color and process temperature.”
Coatings
“Whiteness, particle and impurity controls aligned with coating viscosity, color, substrate and fire-performance needs.”
Textile coatings
“A grade and document package reviewed for coating application, handle, durability, fire testing and market requirements.”
Questions sales should ask before quoting
- Which polymer, elastomer, coating or textile system is used?
- Which halogenated flame retardant or existing package is used?
- What fire standard, specimen thickness and pass level are required?
- What color, whiteness, tint and optical limits apply?
- Which particle-size method and limits are approved?
- Which heavy metals or restricted substances must be declared?
- What sample quantity, packaging and trial schedule are needed?
How much antimony trioxide is needed for a formulation trial?
The calculator converts a buyer-approved percentage into a material quantity. It does not recommend a dosage or predict a fire-test result.
Calculation boundary
- ATO quantity: total batch mass multiplied by the buyer-approved ATO percentage.
- Bag estimate: calculated ATO kilograms divided by the selected bag mass, rounded up.
- Residual material: ordered bag mass minus calculated requirement.
- Not included: formulation design, bromine-to-antimony ratio, smoke, color, density, mechanical properties or compliance.
Use the percentage only after technical review. The correct loading depends on polymer chemistry, flame-retardant system, thickness, processing and target standard.
How should antimony trioxide be tested and accepted?
The incoming plan should connect the physical bags, sample, analytical report and production trial to the same grade and lot.
Identify the lot
Record grade, lot number, bag count, net mass, producer, origin and supplier documents.
Inspect packaging
Check seals, labels, damage, moisture exposure, contamination and bag consistency.
Sample safely
Use the plant procedure, suitable dust controls and representative increments across the defined lot.
Test critical properties
Confirm the agreed chemistry, particle size, whiteness or color, moisture and application-specific controls.
Validate in formulation
Run the defined compound and fire-test program before approving a new grade or supplier.
Which files should be public, and which must stay grade-specific?
Use public buyer tools to earn trust and backlinks. Upload legal product documents only after the manufacturer or legal supplier verifies them.
Safe public downloads included in this package
Fields to define before requesting a gradePDF
Storage and handling guide
General powder-control and warehouse checklistPDF
Document review checklist
TDS, SDS, CoA and declaration controlsPDF
Buyer specification template
Technical and application fieldsCSV
RFQ template
Grade, trial, documents, packing and deliveryCSV
Incoming inspection checklist
Lot, packaging, sample and test controlsCSV
Upload later only when verified
- Grade-specific TDS: issued by the producer or legal supplier.
- Current SDS: correct legal entity, grade, market, language and revision.
- Representative CoA: clearly marked sample only, with confidential data removed lawfully.
- Shipment CoA: sent to the buyer for the actual lot, not used as a generic public claim.
- REACH or regulatory declarations: only for the correct substance, entity, tonnage and supply chain.
- RoHS or restricted-substance statement: scope and test basis must be explicit.
- Particle-size report: grade, method, dispersion conditions and date must match.
Do not publish a fabricated SDS, CoA or compliance certificate. Incorrect chemical documents can create legal, safety, customs and product-liability risk.
How should Sb2O3 powder be packed and shipped?
The packing plan should protect powder quality, worker safety, lot identity and container condition.
- Inner protection: confirm liner, sealing method and moisture barrier.
- Bag identity: grade, lot, net mass, producer or supplier and handling marks.
- Pallet control: stable stacking, wrap or cover, strap condition and maximum pallet mass.
- Dust control: closed transfer and suitable local procedures during sampling, handling and dosing.
- Container condition: clean, dry, odor-free and free from incompatible residues.
- Document match: invoice, packing list, CoA, origin and transport records must identify the same shipment.
Packing sizes shown in a calculator or template are planning options only. Confirm available bag and FIBC formats for the selected grade and route.
Send an application-ready antimony trioxide requirement.
The fastest useful quote starts with the polymer, application, approved specification, trial quantity, documents and destination.
What AHR should sell
- Specification fit: a grade matched to the buyer’s process and approval limits.
- Document readiness: a current, grade-specific CoA, SDS, TDS and applicable declarations.
- Trial support: agreed sample form, quantity, packaging and technical questions.
- Supply clarity: producer, origin, location, quantity, packing, lead-time basis and route.
- Commercial clarity: dated offer, validity, Incoterm, payment and included costs.
Do not sell “the best ATO.” Sell the verified grade that fits the buyer’s formulation, test target, compliance scope and production process.
Antimony trioxide sourcing FAQ.
Direct answers for compounders, cable producers, masterbatch manufacturers and chemical distributors.
What is antimony trioxide used for?
It is primarily used as a synergist in selected halogenated flame-retardant systems for plastics, rubber, paints and textiles. Other uses depend on grade and application.
Is antimony trioxide a stand-alone flame retardant?
Usually it is used as a synergist with a defined flame-retardant package. The formulation and fire-test result must be validated for the actual polymer and specimen.
Which specifications matter most?
Purity, individual impurities, particle-size distribution, whiteness or color, moisture, surface treatment, bulk behavior, grade identity, packaging and current documents.
What dosage should I use?
There is no universal dosage. Use a level approved by the compounder after considering the polymer, halogen source, thickness, test standard, additives, color and mechanical-property targets.
What documents should I request?
Request the current grade-specific TDS, SDS, lot CoA, packing specification, origin and any market- or application-specific declarations required by your compliance team.
Can a sample CoA prove the shipment quality?
No. A sample CoA only shows an expected format or historical example. Shipment acceptance should use documents and testing linked to the actual lot.
Is the product stored in Dubai?
Do not assume local stock from a UAE commercial contact. The written offer should identify the actual producer, origin, stock location, quantity and route.
Official sources and commercial boundaries.
Official sources support chemical identity, use and risk context. Current grade, regulatory and shipment claims require supplier documents.
USGS Antimony Information
Primary use of antimony trioxide in flame-retardant formulations.
ECHA Chemical Identity
European chemical identity and regulatory information entry.
U.S. EPA ATO Assessment
ATO use as a synergist in halogenated flame-retardant systems and ecological risk context.
USGS Commodity Profile
Historical discussion of commercial ATO grades and impurities.
Need an application-specific Sb2O3 grade review?
Send your polymer, fire-test target, technical limits, trial quantity, destination and document requirements.