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HS Code |
461239 |
| Chemical Name | Antimony Trisulfide |
| Chemical Formula | Sb2S3 |
| Molar Mass | 339.68 g/mol |
| Appearance | Gray-black or orange-red crystalline solid |
| Melting Point | 550 °C |
| Boiling Point | 1080 °C (decomposes) |
| Density | 4.12 g/cm³ |
| Solubility In Water | Insoluble |
| Cas Number | 1345-04-6 |
| Main Uses | Pyrotechnics, match heads, explosives, flame retardants |
| Odor | Odorless |
| Refractive Index | 2.72 |
As an accredited Antimony Trisulfide factory, we enforce strict quality protocols—every batch undergoes rigorous testing to ensure consistent efficacy and safety standards.
| Packing | Antimony Trisulfide is packaged in a sealed 500-gram HDPE bottle, labeled with hazard symbols, product details, and safety instructions. |
| Shipping | Antimony Trisulfide should be shipped in tightly sealed containers, clearly labeled, and compliant with local and international hazardous material regulations. It must be kept away from strong acids, oxidizers, and ignition sources. Store in a cool, dry environment, and during transit, handle with care to prevent spills or dust generation. |
| Storage | Antimony trisulfide should be stored in a cool, dry, well-ventilated area away from sources of ignition, heat, and incompatible materials such as strong acids and oxidizers. The container must be tightly closed, clearly labeled, and made from a suitable, corrosion-resistant material. Protect from moisture, and keep away from food and drinking water. Follow local regulations and safety guidelines for hazardous chemical storage. |
Applications of Antimony Trisulfide in Industrial ManufacturingAs a direct manufacturer, we supply high-purity antimony trisulfide for established applications in the defense, safety, electronics, ceramic, and pyrotechnic sectors. Each end use requires strict compliance and process adaptation to achieve reliable industrial scale-up and precise performance in the final product. 1. Primer and Detonator Charges for AmmunitionAmmunition manufacturing relies on antimony trisulfide as a key priming agent in percussion-sensitive mixes. Its unique physical and chemical properties enable controlled ignition sensitivity and stable performance in both small and large caliber ammunition. Our production follows stringent requirements from military and civil munitions manufacturers, focusing on critical particle size, free acid content, and impurity control to minimize misfire risk and optimize charge uniformity. Industry compliance standards
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2. Safety Match and Ignition Head ManufacturingProducers in the safety match and lighter industries require consistent sensitivity and controlled burn rate in ignition heads. Antimony trisulfide acts as a fuel component in combination with oxidizers, adjusting friction response and ignition characteristics to industry norms. We supply grades with tailored purity and particle size for consistent strike reliability and minimized afterglow in safety heads and book matches. Industry compliance standards
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3. Military Pyrotechnics and Signal DevicesManufacturers of military-grade pyrotechnic compositions use antimony trisulfide in colored light emitters, signal flares, tracer rounds, and smoke formulations. Its function as a high-temperature fuel or smoke precursor enables stable light emission, precise burn profiles, and effective obscurant material. Our plant tailors particle morphology and surface treatment for uniform dispersion and combustion reliability in all climatic conditions. Industry compliance standards
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4. Friction Materials for Brake LiningsTier-one automotive and rail friction material producers incorporate antimony trisulfide to balance wear rate, friction stability, and thermal resistance in non-asbestos organic (NAO) brake pads and linings. The powdered form acts as a mild lubricant and dynamic friction stabilizer, crucial for automotive NVH (noise, vibration, and harshness) control and extended pad life during frequent stop-start use. We supply controlled granulation grades to ensure consistent dosing and mixture integrity on high-speed compounding lines. Industry compliance standards
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5. Infrared (IR) Absorbing Glass and Enamel ProductionAntimony trisulfide serves as a fining and IR-modifying agent in specialty glass and enamel manufacturing. Its addition helps control bubble removal during melt and adjusts IR transmission properties crucial for automotive, architectural, and technical glass products. Our material is precisely graded to achieve rapid dissolution and even dispersion within the glass matrix, reducing defects and ensuring repeatable optical qualities. Industry compliance standards
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Competitive Antimony Trisulfide prices that fit your budget—flexible terms and customized quotes for every order.
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As hands-on manufacturers of antimony trisulfide, we witness its importance across industries every production cycle. In our own plant, antimony trisulfide, with its deep orange-red to gray-black color, emerges from high-grade raw material processed under careful controls. Every batch of our main product, Sb2S3 99.5% min, carries behind it years refining our craft. From the mining and purification of antimony ore to the precise sulfuration stage, it’s about more than just ticking boxes on a specification sheet. It’s about meeting customer needs for performance and consistency in challenging technical environments.
Our primary line—antimony trisulfide (model: Sb2S3 99.5%)—remains a core industrial grade, favored by downstream users who demand a clean, stable supply. We focus on both powder and granular forms, with particle size tailored to actual demand—the most common mesh sizes range from 200 to 325, but custom fineness is possible for customers with specialized blending or formulation needs. Tracing back through years of feedback, the real difference isn’t just purity; it’s absence of unwanted residuals like lead, arsenic, or heavy metal contaminants. Some products coming from smaller operations or recycled material show higher levels of these impurities, causing real headaches at the user’s end—whether for military, technical, or pigment applications. We commit to strict impurity control, supported by routine in-house and third-party lab testing. Ash and acid insoluble values stay tightly within requested ranges, and we do not cut corners by using cheap ore or loosely-sourced feedstocks.
Through decades of direct supply, we find three broad application clusters: friction materials (brake linings, clutch facings), pyrotechnics, and pigment manufacture. In every sector, specific performance features drive demand for our product. Brake pad formulators rely on our trisulfide for its unique lubricating effect and stability at high temperatures. It helps to manage heat build-up and wear in both automotive and industrial friction applications. Dynamics inside a brake system are unforgiving; impurities or particle inconsistencies translate to noise or premature failure. Working directly with customers, we tweak particle distribution to match their press and baking conditions.
In the fireworks and explosives field, especially for military-grade primers and matches, batch-to-batch consistency is critical. Antimony trisulfide here serves as a key fuel and colorant, igniting reliably under controlled impact or friction. Military contractors often audit our plant, interested not just in finished specs but in how raw materials are controlled and what traceability systems back every shipment. Quality assurances are not optional add-ons—they are rooted in our process control philosophy. Sensitivities to heavy metal cross-contamination are especially acute for these customers, given the reputational and safety risks involving energetic compounds.
Pigment and glass customers approach us for a stable chemical input that creates vivid, stable oranges and yellows. Here, color uniformity matters more than particle size. We take care with ore source and process conditions to guarantee oxide content that translates directly to hue. These users conduct their own color development trials, so consistency with every batch remains their bottom line.
Manufacturing antimony trisulfide from raw ore to finished powder involves multiple steps where errors have lasting impact on product performance. We start by selecting higher grade antimony concentration, always focusing on the purity levels required for demanding end users. Each melting and reaction phase takes place in atmosphere-controlled environments engineered to minimize unwanted oxidation or sulfide loss. Sulfuration and reduction temperatures are carefully sealed and monitored, never left to chance or left open to ambient air intrusion. Any deviation has immediate effects on the final Sb2S3 content and trace impurities. One cannot just blend out off-spec batches; consistency arises from vigilance, skilled operators, and ongoing investment in plant upgrades.
Even cooling rates after synthesis mean something in our process. Too rapid and the powder structure becomes fragile, compromising downstream performance. Too slow and there’s risk of oxidation or the formation of unwanted polymorphs like antimony pentasulfide. From crushing to milling, every machine is calibrated for minimal contamination, and frequent downtime for cleaning keeps product integrity high. All waste streams are monitored for compliance and minimized for environmental safety—our process engineers have learned that sloppiness leads to compliance trouble down the line, not just an inferior product.
Many buyers mistake antimony trisulfide for other antimony compounds: antimony trioxide (Sb2O3), antimony pentasulfide (Sb2S5), or metallic antimony. Each has different properties and application niches. For example, antimony trioxide shows up in flame retardants and as a synergist with halogenated compounds. Our trisulfide, on the other hand, interacts chemically and physically in application-specific ways that no other antimony variant reproduces. It doesn’t act as a flame retardant; instead, its lubricating and chemical reactivity powers ignition and color formation. Mixing or substituting these materials inappropriately results in performance failures—our technical team routinely explains to buyers why our trisulfide cannot substitute for the oxide or metal version in either friction or pyrotechnic work.
Sometimes we receive requests to provide both pentasulfide (Sb2S5) and trisulfide samples for head-to-head trials. Real-world differences are apparent even before analytical testing. Pentasulfide, with higher sulfur content, looks markedly different—deep red and less stable to processing heat. In most practical cases, pentasulfide fails to match the lubricity, safety, and ignition properties needed for military and advanced friction applications. On the pigment side, trisulfide's chemistry ensures richer, more stable hues compared to other sulfur-containing inputs.
Quality control is not a slogan—it’s a continuous challenge. Each batch comes with a detailed certificate of analysis, backed by repeatable instrumentation, but that is only part of our discipline. Serious customers look beyond the numbers. They care about lot-to-lot consistency, shipment traceability, and honest communication when they challenge our process choices. In the last years, international buyers from Europe, North America, and Asia have stepped up their audit standards. It’s no longer enough to claim ISO or REACH compliance—we must demonstrate everything from raw material procurement to finished product dispatch. Many of our investments in plant-level controls come from tough conversations with project engineers at customer sites. Through technical visits, shared samples, and routine cross-testing, we sharpen our quality standards continuously.
Real technical issues do arise. Sometimes a friction-materials customer gets abnormal brake test results or notices unusual wear debris. We look at their incoming lab data, test our retained samples, and dive into production logs. Most cases trace back to hidden plant issues—change in milling speed, slightly different raw ore content, or a maintenance-related variance. Our open approach, inviting customers to participate in root-cause studies, sets us apart. Technical transparency, not just a paper trail, poses the difference between a trustworthy supplier and an unreliable one.
Our decades of shipping antimony trisulfide worldwide have taught us to never underestimate practical logistics. Antimony trisulfide absorbs moisture if given the chance, so we take pains to watch storage humidity, from our warehouse to customer off-take. Every drum or bag gets sealed against water vapor and stacked on pallets off the ground. Routine warehouse checks often reveal moisture hot spots—where the roof leaks, for example, or where forklifts bring in outside rainwater. These aren’t abstract lessons; every real-world incident informs our procedures. We take photos, update packing material, and train warehouse staff. Customers appreciate real problem-solving, not just theoretical advice.
Shipping restrictions and classifications for antimony trisulfide evolve continuously. Regulatory definitions in the US, EU, and Asia differ regarding hazardous material status, heavy metal content, and labeling. We stay up to date, working regularly with shipping agents and customs authorities. Delays due to paperwork snags in the port cost everyone time and money, so we maintain our own compliance documentation—SDS, ASTM, EU directives—ready to go, updated and sitting with every shipment. If requirements change, as with tighter restrictions on lead or arsenic a few years ago, we rotate stock and notify all affected partners.
Long-term storage needs include protection from heat and strong oxidizers. We communicate this clearly on every drum and through every sales conversation. Overexposure to heat risks decomposition, turning the active trisulfide unusable. We are ready with replacement shipments in case of transit mishaps, and do not shy from taking responsibility if carrier error damages our goods.
Modern buyers care about more than purity and price—they ask serious questions about sourcing, worker safety, and downstream handling. Antimony, as a heavy metal, faces regular reexamination from regulators worldwide. We have watched Europe in particular tighten environmental exposure standards, driving investment into dust collection and wastewater controls on our own line. Our commitment goes beyond compliance—plant managers are trained to spot risks, flag equipment anomalies, and initiate immediate corrective steps. Any worker reporting exposure symptoms receives immediate support, and we promote testing for metals as part of our health regime. We have seen how a lax safety culture elsewhere leads to downstream product bans or expensive recalls. Sticking to strict stewardship builds both legal security and customer loyalty.
Waste disposal often poses a bigger regulatory challenge than production itself. We treat all waste solids and spent bags as potentially hazardous, routing them to authorized treatment centers. Local regulators conduct surprise audits; our best advice for others in this sector remains the same after many years—don’t gamble, document everything, and keep clear records ready.
Antimony’s international market fluctuates with mining activity, especially as major sources from China control most of the world’s supply. Over the years, intermittent mine closures, export controls, and stricter environmental regulations in Asia have occasionally created raw material bottlenecks. We navigate this with diversified sourcing, holding safety inventories to smooth out sporadic market volatility. When raw antimony ore prices spike, we focus more attention on process yields and reducing waste, but never accept recycled or off-spec ore that might introduce unwanted elements into the finished product. Customer trust flows from these hard choices.
Customers sometimes ask about supply chain tracking and long-term contracts. We answer that experience shows flexibility matters more than rigid contracts. By maintaining long-standing relationships upstream and down, we get notice of pending changes before spot market buyers. Our sales and technical teams communicate directly with both purchasing and R&D staff at customer sites. This two-way dialogue delivers insights about new application requirements, regulatory headwinds, or innovation challenges in end-user industries.
Looking toward the future, applications for antimony trisulfide are shifting. Some customers now explore new uses in semiconductor and next-generation battery technology, searching for sulfide-based materials with unique electrical properties. While demand in traditional sectors like pyrotechnics or friction materials remains robust, we constantly upgrade our technical competence to meet novel requirements. Our R&D team conducts internal trials, supporting customer pilots and responding to data requests with real test results—not just marketing copy.
Real reliability in antimony trisulfide supply and performance roots itself in the daily discipline of manufacturing, materials selection, safety leadership, and honest, open technical dialogue. Product quality doesn’t happen by accident; it is the outcome of years of learning, investing, adapting, and always listening to customer experience. As frontline manufacturers, we put our reputation into every shipment, batch, and drum delivered to the end user. At every stage, we keep learning from customer problems, regulatory changes, and technical surprises that keep this sector challenging and rewarding. Each improvement loops back into our processes—sometimes costly, often invisible, but always keeping us one step ahead. Experience proves the difference, batch after batch.
