Antimony trioxide (Sb₂O₃, CAS 1309-64-4) spot prices exceeded $25,000/MT in Q1 2026 and have moved materially higher since — the Fastmarkets MB Antimony MMTA standard grade II in-warehouse Rotterdam metal benchmark was assessed at $58,000–$59,650/MT (as of 2026-05-09, source: Fastmarkets MB), more than 4× the $12,000/MT 2024 average and roughly 2.3× the Q1 2026 trioxide level. Trioxide market prices have followed the metal benchmark upward; readers should confirm the current trioxide spot against Fastmarkets MB Sb₂O₃ Rotterdam/Antwerp at quote time. The price move is not a cyclical demand spike. It reflects a structural break in the export channel out of China, which produces roughly 55% of mined supply and 60–80% of refined trioxide capacity (USGS Mineral Commodity Summaries 2026). For Pakistani, Indian, and European compounders, the immediate operational problem is not the headline number — it is that licensed Chinese cargoes are running 60–90 days behind nominated shipping windows, breaking forward contracts that previously settled inside 30 days.
What Actually Changed: MOFCOM Announcement No. 33 of 2024
China's Ministry of Commerce announced new export controls on antimony, antimony ore, antimony oxides, and related products via MOFCOM Announcement No. 33 of 2024, effective 2024-09-15. The regime requires per-shipment end-user certificates, dual-use review, and case-by-case Ministry approval. Through 2025 the licensing throughput was uneven; by Q1 2026, processing times for export licences settled into a 60–90-day window, with rejections cited for end-uses with any potential defence linkage. Western trade publications estimate available seaborne supply has been compressed by 25–30% relative to pre-2024 baselines, though Chinese MOFCOM does not publish licensing-throughput statistics, so all such figures should be treated as trade-press estimates rather than authoritative numbers.
Why the LME Cannot Bail the Market Out
Unlike copper, zinc, or lead, antimony has no London Metal Exchange contract — no warehoused stocks, no daily cash settlement, no liquid futures curve. Western buyers price off Fastmarkets MB Rotterdam (antimony 99.65% min, in-warehouse) and Argus Metals International assessments; Chinese-domestic transactions reference Asian Metal and SHMET indices. The arbitrage between these references has widened to historically anomalous levels in Q1 2026 as Chinese-domestic prices have lagged Rotterdam by 15–20% — a function of weak Chinese industrial demand combined with restricted ability to clear the surplus internationally. For a procurement team, this means quoted prices vary materially by source, and the headline number cited in trade press depends on which benchmark the publication uses.
Demand: Defence Buys Are Multi-Year, Not Spot
Antimony's end-use split, per Roskill and Project Blue annual analyses, is roughly 50–60% flame retardants (antimony trioxide as a synergist in halogenated FR systems), ~15% lead-acid battery grid alloys, and a growing 15–20% defence segment covering ammunition primers, tracer rounds, hardened lead-antimony shot, and infrared semiconductor compounds (InSb, GaSb). The defence component is the demand driver that distinguishes the current cycle from previous antimony rallies: NATO ammunition procurement commitments are multi-year budget authorisations, not spot purchases. The US Defense Logistics Agency's National Defense Stockpile lists antimony as a strategic material and disclosed FY24 acquisition authorisations through its annual report (DLA Strategic Materials). The EU's Critical Raw Materials Act (Regulation 2024/1252) and the equivalent UK and Australian classifications place antimony on every Western critical-minerals list now in force.
Non-Chinese Supply: What's Actually Available Before 2028
Tajikistan (Anzob, Konchoch) produces ~12,000 t/yr of antimony concentrates; Russia's output is partially obscured by sanctions disclosure rules; Myanmar produces 3,000–5,000 t/yr through a mix of formal and informal operators; Bolivia and Turkey together add another 5,000–7,000 t/yr. The flagship non-Chinese development project is Perpetua Resources' Stibnite Gold project in Idaho (USA), which secured a final environmental impact statement in 2024 but is targeting initial production in 2028 at the earliest. For a buyer planning Q3 2026 deliveries, none of the non-Chinese projects under development materially change near-term availability — the supply gap has to be filled from existing operations or from recycled antimony (~15% of supply, primarily from used lead-acid batteries).
What Buyers Need to Verify Before Signing a Q3 Contract
- Product specification — Sb₂O₃ ≥ 99.5%, As ≤ 0.10%, Pb ≤ 0.10%, water-soluble matter ≤ 0.20%. Trioxide, metal ingot (99.65%), and ore concentrate are different products with different HS codes; confirm the form on the LOI.
- Origin documentation — Certificate of Origin from the local Chamber of Commerce, mining licence reference, and assay from an internationally recognised laboratory (SGS, Alfred H Knight, or Bureau Veritas).
- Export-licence exposure — If the seller routes Chinese-origin material under MOFCOM Announcement No. 33, confirm the licence number, end-user certificate status, and the seller's track record on shipment windows in the past 90 days.
- Pricing reference — Anchor the contract to a named index (Fastmarkets MB Rotterdam or Asian Metal China spot) with a specific pricing window (cargo loading date, monthly average, etc.), not to a "market price at delivery" clause.
- Force majeure language — Modern antimony contracts should explicitly carve out export-licence delays as a vendor force-majeure event only where the seller proves a timely application; otherwise the delay risk transfers to the seller.
Where the Antimony-Crisis Read Misfires
- Quoting "the LME antimony price" in any internal memo — there isn't one. The benchmark is Fastmarkets MB Rotterdam for Western trade and Asian Metal / SHMET for China-domestic.
- Interchanging antimony ore, antimony metal, and antimony trioxide — they have different specifications, customs codes, and prices. A trader quoting "antimony at $25,000" without naming the form is selling something the buyer has not specified.
- Accepting demand-share percentages without a year — "60% flame retardants" was true in 2018, may be ~50% in 2026; cite the specific Roskill, Project Blue, or USGS report and year.
- Assuming substitution will solve the problem fast — aluminium hydroxide (ATH) and magnesium hydroxide (MDH) can replace Sb₂O₃ in some flame-retardant systems, but they require 2–4× loading and changes to the polymer formulation; large compounders need 6–12 months to requalify.
- Extrapolating the current price gap between Rotterdam and Asian Metal — it will close, in one direction or the other, when MOFCOM either tightens licensing further or relaxes it. Procurement plans betting on a single direction carry real downside.
How Bare Syndicate's Non-Chinese Sourcing Operates
Bare Syndicate maintains direct supplier relationships in Pakistan, Tajikistan, and selected African operations, with assay-verified material and a documentation pack covering origin, mining-licence reference, and SGS-class certificates. Cargoes ship FOB Karachi or Port Qasim under Incoterms 2020, with optional CIF terms to most Asian and European discharge ports. Where Chinese-routed product is required, we confirm the MOFCOM licence reference and end-user-certificate status before quoting.
Next step: Review our antimony ore and antimony concentrates product pages for specifications and origin documentation, or request a delivered-cost indication for Q3–Q4 2026 supply. See the full Minerals & Mining division for the broader strategic-minerals portfolio.
Last reviewed: 2026-05-15. Pricing snapshot dated 2026-04-14 is outside the seven-day freshness window — this post is queued for a refresh; contact us for live quotes.
