Thiosulfate Leaching Reagent Market Growth to 2035 Driven by Cyanide Bans in Gold Mining – News and Statistics

Abstract

According to the latest IndexBox report on the global Thiosulfate Leaching Reagent market, the market enters 2026 with broader demand fundamentals, more disciplined procurement behavior, and a more regionally diversified supply architecture.

The global thiosulfate leaching reagent market is entering a phase of sustained expansion, underpinned by tightening environmental regulations on cyanide use and the enduring appeal of precious metals as a store of value. Between 2026 and 2035, demand is projected to grow at a compound annual rate of 4–6%, with the market index climbing from 100 in 2025 to roughly 150 by 2035. This growth is not uniform across applications; while gold mining remains the dominant consumer, accounting for 55–65% of reagent volume, the fastest acceleration is occurring in copper leaching and electronics recycling, where thiosulfate-based systems offer a viable alternative to cyanide and a route to recover metals from complex ores and e-waste. Supply is concentrated among a handful of specialty chemical producers in China, the United States, and Western Europe, creating structural import dependence in mining-intensive regions such as Africa, Latin America, and Southeast Asia. As a result, procurement strategies are shifting toward long-term off-take agreements and supplier diversification. The market is also witnessing product innovation, with stabilized thiosulfate solutions and copper-ammonia-thiosulfate systems gaining traction for their improved leaching kinetics and reduced reagent consumption. This report provides a comprehensive analysis of market size, demand architecture, supply chain dynamics, trade flows, pricing, and competitive landscape, offering a data-driven foundation for strategic planning through 2035.

The baseline scenario for the thiosulfate leaching reagent market over 2026–2035 reflects a steady upward trajectory, supported by regulatory tailwinds and technological maturation. Global demand is expected to expand at a CAGR of 4–6%, with the market index reaching approximately 150 by 2035 (2025=100). The gold extraction segment will continue to drive volume, but its share will gradually decline as copper leaching and electronics recycling gain prominence. In gold mining, thiosulfate is increasingly adopted in regions where cyanide is banned or restricted, such as parts of Europe and North America, and in operations processing carbonaceous or copper-rich ores where cyanide is inefficient. The electronics recycling segment is poised for the fastest growth, with a CAGR near 7–9%, as urban mining becomes a strategic source of precious metals and regulatory pressure on e-waste disposal intensifies. Copper leaching, particularly for oxide and secondary sulfide ores, is also expanding, supported by the global energy transition and rising copper demand. Supply-side dynamics are characterized by concentrated production and raw material price volatility, which is prompting buyers to secure long-term contracts. Challenges remain, including competition from alternative lixiviants like glycine and thiourea, quality consistency issues, and logistical costs in remote mining locations. Nevertheless, the overall outlook is positive, with thiosulfate positioning itself as a credible, environmentally safer alternative to cyanide in a growing number of applications.

Demand Drivers and Constraints

Primary Demand Drivers

• Tightening cyanide regulations and bans in several countries, pushing miners toward non-cyanide alternatives
• Rising gold prices and sustained demand for safe-haven assets, increasing the economic viability of thiosulfate leaching
• Growth in electronics recycling and urban mining, creating new demand for thiosulfate-based metal recovery
• Technological advancements in copper-ammonia-thiosulfate systems improving leaching efficiency and reducing reagent consumption
• Increasing complexity of ore bodies, including carbonaceous and copper-rich ores, where thiosulfate outperforms cyanide
• Environmental and safety advantages of thiosulfate, including non-toxicity and operation under mildly alkaline conditions

Potential Growth Constraints

• Competition from alternative non-cyanide lixiviants such as glycine and thiourea, which may offer cost or performance advantages in specific applications
• Quality consistency issues with thiosulfate reagents, leading to batch-to-batch variations that disrupt leaching kinetics and require additional validation
• Logistical and storage challenges, including limited shelf life and temperature sensitivity, adding 8–15% to delivered costs in remote mining locations
• Higher reagent consumption and slower leaching kinetics compared to cyanide in some ore types, limiting adoption in price-sensitive operations
• Lack of established large-scale commercial references, creating hesitancy among mining companies to switch from proven cyanide processes

Demand Structure by End-Use Industry

Gold Mining (estimated share: 60%)

Gold mining remains the largest consumer of thiosulfate leaching reagents, accounting for roughly 60% of global volume. The segment is driven by the need to process ores that are refractory to cyanide, such as carbonaceous and copper-bearing ores, where thiosulfate offers higher recovery rates. Regulatory pressure in jurisdictions like the European Union and parts of North America is accelerating the adoption of non-cyanide alternatives. Through 2035, demand will be supported by sustained gold prices, which make the higher reagent consumption of thiosulfate economically viable. Key demand-side indicators include gold mine production volumes, the share of refractory ore processing, and the stringency of environmental regulations. Major mining companies are increasingly piloting thiosulfate circuits, and the segment is expected to grow at a CAGR of 4–5%, with market share remaining dominant but slightly declining as other applications expand. Current trend: Steady growth, with gradual shift from cyanide to thiosulfate in regions with regulatory bans and complex ores.

Major trends: Increasing adoption in carbonaceous and copper-rich ore processing, Pilot and commercial-scale thiosulfate leaching projects in North America and Europe, Development of stabilized thiosulfate formulations to reduce reagent consumption, and Partnerships between mining companies and reagent suppliers for tailored solutions.

Representative participants: Barrick Gold Corporation, Newmont Corporation, AngloGold Ashanti Limited, Kinross Gold Corporation, Polyus Gold, and Orica Limited.

Copper Leaching (estimated share: 20%)

Copper leaching is the second-largest application for thiosulfate reagents, representing about 20% of demand. Thiosulfate is particularly effective in leaching copper from oxide and secondary sulfide ores, where traditional acid leaching is less efficient or environmentally problematic. The global push toward electrification and renewable energy is driving copper demand, prompting miners to develop lower-grade and complex deposits. Thiosulfate-based systems offer higher recovery rates and lower environmental impact compared to sulfuric acid, especially in ores with high carbonate content. Through 2035, the segment is expected to grow at a CAGR of 6–7%, supported by technological improvements in copper-ammonia-thiosulfate systems that enhance leaching kinetics and reduce reagent costs. Key demand indicators include copper mine production, the share of heap leaching in copper extraction, and investments in new leaching projects. Major copper producers are exploring thiosulfate as a way to improve recovery from existing stockpiles and waste dumps. Current trend: Fast-growing, driven by copper demand for energy transition and the need to process secondary sulfide ores.

Major trends: Adoption of thiosulfate for secondary sulfide and mixed oxide-sulfide ores, Integration with solvent extraction and electrowinning (SX-EW) circuits, Development of low-cost stabilizers to improve reagent efficiency, and Growing interest in in-situ leaching applications.

Representative participants: Codelco, Freeport-McMoRan Inc, BHP Group, Rio Tinto Group, Anglo American plc, and Nouryon.

Electronics Recycling (Urban Mining) (estimated share: 12%)

Electronics recycling is the fastest-growing end-use segment for thiosulfate leaching reagents, accounting for about 12% of demand and expanding at a CAGR of 7–9%. The segment involves recovering gold, silver, and copper from printed circuit boards, connectors, and other electronic components. Thiosulfate offers a non-toxic alternative to cyanide for urban mining operations, aligning with stricter e-waste regulations and corporate sustainability goals. The growth is supported by the increasing volume of e-waste globally, which is projected to reach 75 million metric tons by 2030, and the rising value of precious metals recovered from electronic scrap. Through 2035, the segment will benefit from technological advancements in leaching processes that improve recovery rates and reduce reagent consumption. Key demand indicators include e-waste generation rates, recycling capacity investments, and the price of gold and copper. Major electronics recyclers are scaling up thiosulfate-based processes to meet regulatory and environmental standards. Current trend: Highest growth segment, with CAGR near 8%, driven by e-waste volumes and precious metal recovery.

Major trends: Increasing e-waste volumes and regulatory pressure for responsible recycling, Development of closed-loop thiosulfate recovery systems to reduce reagent costs, Integration of thiosulfate leaching with hydrometallurgical refining, and Partnerships between recyclers and chemical suppliers for process optimization.

Representative participants: Umicore N.V, Aurubis AG, Dowa Holdings Co., Ltd, Boliden Group, Johnson Matthey plc, and Tetronics International.

Silver Extraction (estimated share: 5%)

Silver extraction accounts for approximately 5% of thiosulfate leaching reagent demand. Thiosulfate is effective in leaching silver from ores and concentrates, particularly in operations where silver is a by-product of gold leaching. The segment is driven by the growing use of silver in photovoltaic cells, electronics, and other industrial applications, which supports silver prices and encourages mining of silver-rich deposits. Thiosulfate offers advantages over cyanide in ores containing high levels of copper or other cyanide-consuming minerals, which are common in silver deposits. Through 2035, the segment is expected to grow at a CAGR of 4–5%, in line with global silver mine production. Key demand indicators include silver mine output, the share of silver recovered from polymetallic ores, and technological developments in silver leaching. Major silver producers are evaluating thiosulfate as a way to improve recovery and reduce environmental impact. Current trend: Moderate growth, with thiosulfate gaining traction in silver-rich ores and as a by-product of gold leaching.

Major trends: Growing silver demand from solar and electronics industries, Adoption of thiosulfate for complex silver ores with high copper content, Co-production of silver and gold in thiosulfate leaching circuits, and Research on thiosulfate-based recovery from silver-rich e-waste.

Representative participants: Fresnillo plc, Polymetal International plc, Pan American Silver Corporation, Wheaton Precious Metals Corp, SSR Mining Inc, and Coeur Mining, Inc.

Other Industrial Applications (estimated share: 3%)

Other industrial applications account for about 3% of thiosulfate leaching reagent demand, encompassing uses in catalyst recovery, chemical synthesis, and laboratory-scale testing. Thiosulfate is used in the recovery of precious metals from spent catalysts in the petrochemical and automotive industries, as well as in research and development for new leaching processes. The segment is driven by the need for sustainable metal recovery from industrial waste streams and the growing interest in non-cyanide leaching technologies. Through 2035, the segment is expected to grow at a CAGR of 3–4%, supported by increasing environmental regulations and the circular economy agenda. Key demand indicators include the volume of spent catalysts generated, R&D spending on hydrometallurgy, and the adoption of thiosulfate in niche applications. Major companies in this segment include specialty chemical firms and research institutions. Current trend: Niche but growing, including use in catalysts, chemical synthesis, and laboratory testing.

Major trends: Recovery of precious metals from spent catalysts in automotive and petrochemical industries, Use of thiosulfate in laboratory and pilot testing for new ore types, Development of thiosulfate-based processes for metal recovery from industrial effluents, and Collaboration between academia and industry to optimize leaching conditions.

Representative participants: BASF SE, Johnson Matthey plc, Heraeus Holding GmbH, Tanaka Precious Metals, Umicore N.V, and American Elements.

Key Market Participants

Regional Dynamics

Asia-Pacific (estimated share: 45%)

Asia-Pacific leads the market, driven by China’s large gold mining and chemical production base, as well as growing e-waste recycling in Japan and South Korea. The region is also a major exporter of thiosulfate reagents, with low production costs and expanding capacity. Demand is supported by increasing gold consumption and regulatory shifts toward non-cyanide leaching in some countries. Direction: Dominant and growing.

North America (estimated share: 25%)

North America is a key market, with the United States and Canada hosting significant gold mining operations and a strong focus on environmental compliance. The region is seeing early adoption of thiosulfate in refractory ore processing and e-waste recycling. Supply is supported by domestic specialty chemical producers, but import dependence remains for certain formulations. Direction: Steady growth.

Europe (estimated share: 15%)

Europe is a mature market with stringent environmental regulations, including bans on cyanide in some countries. The region is a hub for e-waste recycling and has a strong focus on sustainable mining practices. Demand is driven by gold and silver extraction in countries like Finland and Sweden, as well as growing urban mining activities. Direction: Moderate growth.

Latin America (estimated share: 10%)

Latin America is a significant gold-producing region, with countries like Peru, Mexico, and Brazil. The market is driven by the need to process complex ores and increasing regulatory pressure on cyanide use. However, logistical challenges and price sensitivity limit adoption. Local production is limited, leading to import dependence from North America and Asia. Direction: Emerging growth.

Middle East & Africa (estimated share: 5%)

Africa is a major gold mining region, with countries like Ghana, South Africa, and Tanzania. The market is driven by the need for safer leaching alternatives and the growth of artisanal mining. However, infrastructure and cost constraints hinder widespread adoption. The region relies heavily on imports, presenting opportunities for suppliers. Direction: High potential.

Market Outlook (2026-2035)

In the baseline scenario, IndexBox estimates a 5.2% compound annual growth rate for the global thiosulfate leaching reagent market over 2026-2035, bringing the market index to roughly 150 by 2035 (2025=100).

Note: indexed curves are used to compare medium-term scenario trajectories when full absolute volumes are not publicly disclosed.

For full methodological details and benchmark tables, see the latest IndexBox Thiosulfate Leaching Reagent market report.