Uses & Applications

Applications and End-Uses for Antimony

Antimony (Sb) is a high-criticality specialty metal with annual global production of approximately 83,000 tonnes. Antimony is a brittle, silvery-white metalloid critical to flame retardant compounds and military applications. China dominates global production, creating significant supply concentration risk. Its use in lead-acid battery alloys and ammunition makes it strategically important for both civilian and defense sectors.

Key Applications

The primary end-uses of Antimony span multiple sectors. The following applications represent the most significant sources of global demand:

• Flame retardants - Key alternatives include Aluminum trihydroxide, magnesium hydroxide, zinc borate. Alternatives are less effective per unit weight, requiring higher loading levels that can degrade material properties
• Lead-acid batteries - Key alternatives include Tin, calcium, selenium. Alternative alloying elements exist but antimony alloys provide superior deep-cycle performance
• Ammunition and defense - Key alternatives include Tin-hardened lead, bismuth, tungsten. Bismuth and tungsten are significantly more expensive; tin alloys offer lower hardness
• Semiconductors - Antimony is valued in semiconductors for its unique physical and chemical properties that are difficult to replicate with alternative materials.
• Plastics stabilizers - Antimony is valued in plastics stabilizers for its unique physical and chemical properties that are difficult to replicate with alternative materials.

Product Forms and Specifications

Antimony is commercially available in 3 primary product forms, each serving different industrial requirements:

Demand Outlook

Antimony appears on both the USGS Critical Minerals List and the EU Critical Raw Materials List, underscoring its strategic importance across Western economies. Growing demand from electrification, digitalization, and defense modernization is expected to place additional pressure on the Antimony supply chain through the end of this decade.