Antimony Is the Flame Retardant and Ammunition Metal That One Country Refines — and Licenses on Its Own Terms

Commodity Deep Dive — part of the Xin.bz Global Commodity Insight series. Browse all: Commodities.

Commodity classification

Classification	Antimony
Rare Earth Element	No
Strategic Resource	Critical — Extreme Supply Risk — three countries hold 85.5% of mine supply and one holds the refining.
Agricultural Industry	None
Manufacturing Industry	Primary — flame retardants, PET catalysts, and glass clarifiers.
Communications Industry	Material — flame-retarded cabling, enclosures, and semiconductor dopants.
Defense Industry	Primary — primers, tracer rounds, armour-piercing cores, and night vision.
Space Industry	Limited — infrared optics and specialty semiconductors.
Hazardous Transport	Moderate — antimony trioxide ships under dust and exposure controls.
Rail Transport	Material — concentrate movement from Central Asian and Chinese mines.
Sea Transport	Primary — concentrate and refined metal in containers.
Land / Road Transport	Material — mine-to-smelter haulage in Bolivia, Myanmar, and Tajikistan.
Air Transport	Limited — high-purity and semiconductor grades.
Market Volatility	Extreme — the price gained 247% in 2024 and fell 40% in the year to September 2026.
Demand Seasonality	Low — flame-retardant and battery demand runs at a steady rate.
Supply Seasonality	Low — underground mines run year-round.
Top Producer	China — 40,000 t in 2025, 36.4% of world mine production.
Top Consumer	China — the largest flame-retardant and battery manufacturing base.
Key Port / Chokepoint	Chinese smelting and export licensing — above 85% of refining capacity, released under a dual-use licence.

Classification scale: Sector relevance = Primary / Material / Limited / None. Risk = Low / Moderate / High. A Key Port / Chokepoint designation means a prolonged disruption would materially affect international supply.

What is it?

Antimony (Sb, atomic number 51) is a brittle, silvery metalloid. Its commercial value rests on one behaviour: antimony compounds work with halogens to interrupt combustion in the gas phase, which stops a burning plastic from sustaining its own flame.

It trades in three principal forms:

• Concentrate, from stibnite ore (antimony trisulfide), typically 50% to 60% antimony.
• Metal ingot, at 99.65% minimum purity, the form quoted on the Rotterdam and Chinese markets.
• Antimony trioxide (Sb₂O₃), the white powder that carries the flame-retardant trade and the largest share of consumption by volume.

Antimony also hardens lead: a few percent in a battery grid raises strength and casting quality, which puts the metal inside most vehicles on the road.

How is it made?

stibnite ore → flotation → concentrate → roasting or smelting → crude oxide or metal → refining → trioxide or 99.65% ingot

Stibnite melts at 550°C, low enough that heat alone separates antimony sulfide from gangue, a simplicity that put the metal in use from antiquity onward. Modern practice roasts to crude oxide or smelts to metal, then refines.

The step that decides the market sits downstream of the mine. Chinese smelters hold above 85% of world refining capacity and produce more than 80% of refined antimony. Concentrate from Bolivia, Myanmar, Tajikistan and Central Asia is finished in China, regardless of where the ore came out of the ground.

Where is it produced?

USGS places 2025 world mine production at 110,000 tonnes, down from 119,000 t in 2024.

Producer	2025 mine production	World share
China	40,000 t	36.4%
Russia	32,000 t	29.1%
Tajikistan	22,000 t	20.0%
Bolivia	5,000 t	4.5%
Myanmar	4,500 t	4.1%
Turkey	3,000 t	2.7%
Other producers	3,500 t	3.2%

Three countries hold 85.5% of supply. Scale is the other half of the story. The world mines 110,000 tonnes of antimony a year, less than a single day of world copper mine output, so a disruption that would be rounding error in a base metal moves this market by tens of percent.

World reserves exceed 2,000,000 t, with China at 830,000 t, Russia 350,000 t, Bolivia 310,000 t, Kyrgyzstan 260,000 t, and Myanmar 140,000 t. Reserves are ample; access and refining capacity are the constraints.

Notable sources & producers

Source / producer	Strategic significance
Hunan and Guangxi (China)	The Xikuangshan district and the smelting base that finishes most of the world’s concentrate.
Chinese smelter groups	Above 85% of world refining capacity, and the reason a mine outside China still depends on China.
Anzob (Tajikistan)	The largest non-Chinese mine complex, at 20% of world supply.
Russian producers	32,000 t in 2025 under sanctions, with output routed through Asian buyers.
Bolivian and Myanmar artisanal supply	Small-scale production that responds fast to price and reports slowly.
Stibnite Gold Project (Perpetua, Idaho)	Broke ground October 2025 with $80 million of conditional U.S. Department of War funding; 14 million tons of reserves at a 0.42% antimony cutoff.
Stibnite Hill Mine (Montana)	Mining started November 2025, the first new U.S. antimony mine in decades.
Larvotto and Australian projects	110,000 t of reserves and the non-Chinese supply the West is counting on after 2028.

What is it used for?

• flame retardants for plastics, textiles, cabling, and building materials, roughly half of consumption
• lead-acid battery grids and alloys, near 15%
• ammunition primers, tracer compositions, and armour-piercing cores
• polyethylene terephthalate (PET) polymerisation catalysts
• glass clarifiers, including photovoltaic cover glass
• semiconductors, infrared detectors, and thermoelectric devices

Why is it important?

Antimony sits in two places that tolerate substitution poorly: fire safety codes and ordnance specifications. Both qualify a formulation against a standard, so changing the chemistry means requalifying the product rather than swapping an input.

Defence demand gives the market its political weight. Primers, tracers, armour-piercing cores, and night-vision optics place a 110,000-tonne market inside the industrial base of every military that manufactures ammunition, and trioxide clarifies photovoltaic cover glass, tying the same market to solar build rates.

Is there a substitute?

Substitutes exist for each application and cost performance in all of them. USGS lists organic compounds and hydrated aluminium oxide as flame-retardant alternatives; chromium, tin, titanium, zinc, and zirconium compounds for antimony chemicals in enamels, paint, and pigment; and combinations of calcium, copper, selenium, sulfur, and tin for lead-acid battery alloys.

Each carries a qualification burden. Halogen-free flame retardants need higher loadings and change the plastic’s mechanical properties, and a substituted battery alloy changes grid corrosion behaviour over the cell’s life. Substitution follows sustained high prices by years rather than quarters, which is why the 2024 move drew announcements rather than displacement. Recycling supplies the rest of the answer: antimony recovers from old lead- acid batteries alongside the lead, the largest supply source outside primary mining.

How is it transported?

mine → concentrator → truck or rail → port → container vessel → smelter → refined metal or trioxide → manufacturer

Antimony moves in containers rather than bulk. Concentrate travels in bags or drums, metal ships as ingot, and trioxide moves as packaged powder under dust and exposure controls, since the compound is classed as a suspected human carcinogen. Container movement leaves the physical chain flexible and the regulatory chain rigid: a cargo reroutes in days, and a licence holds to the terms it was issued under.

Transportation risks

Chinese export licensing

Antimony sits on China’s dual-use export control list, so every outbound shipment requires an approved licence, and that authority operates independently of any port, vessel, or route. The binding constraint on antimony is an administrative decision rather than a physical bottleneck anywhere on the map.

China added the metal to that list in August 2024, banned exports to the United States in December 2024, and suspended the ban on November 9, 2025 until November 27, 2026. The suspension leaves the licensing requirement in place and continues to exclude United States military end users.

Mine-to-smelter haulage

Bolivian, Myanmar, and Tajik output reaches a smelter by road over long distances through difficult terrain. Artisanal supply responds to price within months and reports volumes slowly, which leaves the market trading on estimates.

Sanctioned supply

Russian production of 32,000 t moves under sanctions, which routes it toward buyers willing to transact and removes it from Western supply arithmetic.

How long does it store?

Antimony stores indefinitely. Metal ingot develops a surface oxide that leaves the metal beneath intact, and trioxide powder holds in sealed packaging for years while it stays dry.

That stability makes stockpiling effective, which is why governments hold strategic reserves and why consumers built inventory through 2024 and 2025. In a 110,000-tonne market a few months of buyer inventory is a visible share of annual supply, and inventory cycles move the price as much as mine output does.

Historical price behavior

Antimony metal, USGS monthly and annual averages with the current assessment:

Period	Antimony metal
November 2021	$21,200/t
August 2024	$21,600/t
December 2024	$39,900/t
June 2025	$60,600/t
November 2025	$44,750/t
2025 annual average	$55,100/t
September 18, 2026	$51,800/t

The shape of that series is policy rather than geology. The price nearly doubled between August and December 2024, the months in which China restricted exports and then banned shipments to the United States, and gained a further 52% by June 2025. It gave back ground through late 2025 and into 2026 as buyers worked down inventory, non-Chinese projects advanced, and the ban moved into suspension. Across the cycle the metal gained 247% in 2024, lost 17% in 2025, and entered September 2026 down 40% year over year. A market this small prices announcements as hard as it prices tonnes.

Current price & market — September 21, 2026

Market reference	Current level
Antimony metal, spot	$51,800/t
Year-over-year change	−40%
Antimony trioxide, Rotterdam, Q2 2026	$28,270/t
2025 annual average	$55,100/t
2025 world mine production	110,000 t

The market has been working through the 2024 shock in reverse. Trioxide in Rotterdam fell 26.7% quarter over quarter into mid-2026 on ample supply, and Fastmarkets assessed Rotterdam metal at $58,000–59,650/t in May 2026 against $51,800/t in September.

The supply response arrives on mine schedules rather than trading timelines. The Idaho project broke ground in October 2025 and Montana’s Stibnite Hill Mine started in November 2025. USGS withheld United States mine production for 2025 to protect company data, which is itself the signal that domestic output resumed.

The licence regime sets the ceiling. Availability outside China rests on the November 27, 2026 renewal decision rather than on a production number.

Current-price links: Fastmarkets — Antimony prices · USGS — Mineral Commodity Summaries: Antimony

Price note: USGS publishes monthly and annual averages for antimony minimum 99.65% on a cost-insurance-freight basis, while Rotterdam in-warehouse assessments, Chinese domestic quotes, and trioxide prices each measure a different grade, location, and delivery term, and move on their own basis. Spot assessments and annual averages diverge sharply in a market this thin.

Strategic risks

1. Refining concentration above 85% in one country, which applies to non-Chinese mine supply as well.
2. Export licensing as a policy instrument, renewable or withdrawable on an administrative calendar.
3. Mine supply at 85.5% in three countries, two of them under sanctions or conflict pressure.
4. Market size of 110,000 t a year, small enough that one mine moves the global balance.
5. Qualification burden in flame retardants and ordnance, which slows substitution to a multi-year timescale.
6. Artisanal supply in Bolivia and Myanmar that reports late and responds to price rather than to contracts.
7. Defence demand that competes directly with civilian flame-retardant volume in a fixed supply pool.
8. Project lead times that place meaningful non-Chinese refining after 2028.

What can move the market?

• Chinese export licence approval rates, the November 2026 suspension decision, and changes to the dual-use control list
• Idaho and Montana ramp rates and United States output disclosure
• Australian and other non-Chinese project timelines and financing
• defence procurement and ammunition production rates
• lead-acid battery output and secondary recovery volumes
• photovoltaic glass demand and solar build rates
• Russian sanctions scope and routing
• Bolivian and Myanmar artisanal supply response
• consumer inventory levels, which set the depth of price moves
• USGS and Chinese production revisions
• flame-retardant regulation and halogen-free substitution mandates

Antimony prices respond to licence policy faster than to tonnage, which is why a regulatory announcement moves the market more than a mine does.

Xin.bz bottom line

Antimony is a small metal with a large footprint: half of it stops plastics from burning, and the rest sits in batteries, ammunition, and glass.

The market’s defining number is the 85% of refining capacity that sits in one country rather than the 110,000 tonnes mined each year. Mine supply in Bolivia, Myanmar, Tajikistan, and Central Asia converges on Chinese smelters, so the location of a furnace says more about who controls the metal than the location of a deposit does.

That refining position is paired with a licence regime. Export authority lets one government set availability for everyone else without touching a mine, a port, or a ship, and the price series since 2024 records that authority being exercised. The Western response runs at mine speed, with refining capacity outside China arriving after 2028.

Antimony is the clearest case in commodities where the chokepoint is a signature rather than a strait.

Sources / market data

• U.S. Geological Survey. Mineral Commodity Summaries 2026 — Antimony. February 2026.
• Ministry of Commerce of the People’s Republic of China. Dual-use export control announcements, August 2024, December 2024, and November 9, 2025.
• Fastmarkets. Antimony MMTA standard grade II, in-warehouse Rotterdam assessments, 2026.
• ChemAnalyst. Antimony trioxide Rotterdam price index, 2026.
• Perpetua Resources. Stibnite Gold Project reserve and construction disclosures, 2025–2026.
• United States Antimony Corporation. Stibnite Hill Mine operational statements, 2025–2026.
• U.S. Department of War. Critical minerals funding awards, October 2025.