Substitutes

Substitutes and Alternatives for Arsenic

The availability of viable substitutes is a key factor in assessing the criticality of any mineral. For Arsenic, the substitution landscape varies significantly across its major applications, with some uses offering reasonable alternatives while others face limited or no substitution options.

Substitution by Application

• Semiconductors (gallium arsenide) — Potential substitutes exist with varying degrees of performance trade-offs. Alternative materials may offer lower cost or improved availability but typically involve compromises in efficiency, durability, or other performance characteristics that have established Arsenic as the preferred material.
• Wood preservatives — Potential substitutes exist with varying degrees of performance trade-offs. Alternative materials may offer lower cost or improved availability but typically involve compromises in efficiency, durability, or other performance characteristics that have established Arsenic as the preferred material.
• Pesticides and herbicides — Potential substitutes exist with varying degrees of performance trade-offs. Alternative materials may offer lower cost or improved availability but typically involve compromises in efficiency, durability, or other performance characteristics that have established Arsenic as the preferred material.
• Lead-acid batteries — Potential substitutes exist with varying degrees of performance trade-offs. Alternative materials may offer lower cost or improved availability but typically involve compromises in efficiency, durability, or other performance characteristics that have established Arsenic as the preferred material.

Performance Trade-offs

In most applications, substituting Arsenic with alternative materials involves measurable performance penalties. These may include reduced efficiency, shorter product lifespans, higher weight, or increased manufacturing complexity. In high-performance applications such as semiconductors (gallium arsenide), these trade-offs can be particularly significant, limiting the practical viability of substitution even when alternatives are technically available.

Research and Development

Active research programs are underway to develop improved substitutes for Arsenic in its most critical applications. These efforts include material science research into alternative compounds, engineering approaches to reduce the quantity of Arsenic required per unit of product (thrifting), and entirely new technology platforms that avoid the need for Arsenic altogether. However, timelines for commercializing new alternatives typically span years to decades.

Strategic Implications

While some substitution options exist for Arsenic, its unique properties ensure continued demand across its primary applications. Monitoring substitution trends is important for long-term supply and demand forecasting.