Antimony

Key Takeaways

1. 1Antimony (Sb, atomic number 51) is a brittle silver-white metalloid with unique thermal and electrical properties that make it hard to substitute
2. 2China controls roughly 60% of global output; Vietnam, Myanmar, and Russia account for most of the rest — heavy supply concentration creates significant geopolitical risk
3. 3Flame retardants are the largest use case (~40%): antimony trioxide releases water when heated, cooling materials and diluting combustible gases
4. 4Semiconductors consume ~6,000 tonnes annually — antimony acts as a donor dopant to enhance n-type conductivity in silicon chips
5. 5Alloys round out demand (~20%), hardening lead in batteries and improving the mechanical properties of other metals
6. 6No major new mines have opened in decades and surface operations show variable capacity — supply is structurally inelastic and slow to respond to price signals
7. 7Prices are highly volatile, tied to Chinese production policy, semiconductor cycles, and regulatory shifts; they tripled during the 2010 trade disputes
8. 8The futures market is thin — the Shanghai Futures Exchange offers contracts but with high basis risk; most transactions happen via bilateral forward contracts
9. 9EU RoHS restrictions and California Prop 65 listings are pushing manufacturers toward costlier alternatives, creating long-term demand uncertainty
10. 10Research into antimony-free flame retardants and alternative dopants could reduce demand by 20–30% over the coming decade — a meaningful structural headwind