Ammonium Thiosulfate Market

How big is Ammonium Thiosulfate Market in 2026?

USD 458.8 million in 2026 and USD 940.3 million by 2036 at a 7.4% CAGR.

Demand for ammonium thiosulfate is projected to rise at 7.4% CAGR from USD 458.8 million in 2026 to USD 940.3 million by 2036. The industry is expanding as liquid fertilizer programs need sulfur beside nitrogen without creating another bulk nutrient stream. Montana DEQ decided Phillips 66 Company’s Title V permit OP2619-19 on February 4, 2026 and made it effective March 7. The permit lists an ammonium thiosulfate unit within the Billings sulfur-recovery facility and documents a refinery-linked ATS production route.

Country growth differs because crop systems place different value on precise nutrient delivery and input economics. South Korea is expanding precision agriculture systems, while USA distributors already operate mature fluid fertilizer channels. MAFRA’s February 2025 master plan targets smart systems on 35% of greenhouse area and at least one smart technology on 20% of major field-crop producing areas. The policy favors metered nutrient programs while mature markets compete more heavily on price and seasonal availability.

Key Takeaways of Ammonium Thiosulfate Market

• Demand rises where fertilizer programs purchase sulfur beside nitrogen and schedule bulk ATS deliveries within narrow field application windows.
• By form, solid form is estimated to hold 96.2% in 2026 because the report records crystalline ATS before downstream dissolution or formulation.
• Industrial grade is projected to represent 96.5% of grade demand in 2026 owing to high-volume fertilizer and general chemical specifications.
• Fertilizers are expected to account for 91.3% of end use in 2026 because ATS fits nitrogen-sulfur blending and seasonal crop nutrition programs.
• Site-specific crop response and mixture compatibility can reduce eligible applications and weaken economics when storage or field timing is poor.
• Some of the key players in this market include Tessenderlo Group NV, Koch Fertilizer LLC, Martin Midstream Partners L.P., TIB Chemicals AG, Esseco S.r.l., Kugler Company, Phillips 66 Company, and J Westling & Co.

Analyst Perspective

“ATS should be evaluated on delivered nutrient performance and seasonal reliability instead of quoted product price alone. Commercial value is earned where concentration consistency and local inventory reduce the risk of a missed application window.”

- Nikhil Kaitwade, Principal Consultant, Future Market Insights

How is the Ammonium Thiosulfate Market segmented?

The ammonium thiosulfate market is segmented by form, grade, end use and region.

The ammonium thiosulfate market is segmented by form, grade, end use and region. Form covers solid form and liquid form. Grade includes industrial grade and photo grade. End use covers fertilizers, others, photochemicals and mining. Region follows the standard FMI country taxonomy used in the report scope.

How do Fertilizers anchor the End Use category?

Fertilizer formulators use ATS where nitrogen and sulfur must enter the same liquid nutrient plan without creating a separate dry-material handling step. Adoption depends on crop need and delivery timing within nitrogen fertilizer programs because sulfur response is not uniform between fields.

• Fertilizers are expected to hold 91.3% of end use in 2026 attributable to ATS compatibility with liquid nitrogen programs and seasonal crop nutrition.
• Koch Fertilizer reported in May 2025 that its Brandon plant can upgrade ammonia into ammonium thiosulfate among other fertilizer products, confirming ATS within an established manufacturing route.

What makes Solid Form central to the Form category?

Solid form serves formulation plants that purchase crystalline ATS before controlling dissolution or concentration inside their own process. The category measures an upstream transaction and does not imply that field application is predominantly dry, particularly within specialty fertilizer programs that later use liquid delivery.

• By form, solid form is estimated to hold 96.2% in 2026 owing to its position before downstream dissolution and custom solution preparation.
• In January 2025 TIB Chemicals AG acquired REAXIS Inc. and expanded its North American operating presence. The acquisition gives TIB a closer USA base for customers using its sulfur-chemicals business.

Why does Industrial Grade lead the Grade category?

Industrial grade carries the volume base because fertilizer blending and general chemical processing require bulk consistency without the narrower purity controls attached to photo grade. Qualification focuses on concentration stability and process compatibility within fertilizer additive systems that operate at commercial scale.

• Industrial grade is projected to represent 96.5% of grade demand in 2026 due to its fit with high-volume fertilizer and industrial processing requirements.
• Esseco’s 2024 sustainability report published in 2025 documents product-carbon-footprint work on ATS solution, showing that industrial producers increasingly track process data beside specification compliance.

What are the drivers, restraints and opportunities in the Ammonium Thiosulfate Market?

Sulfur nutrition supports demand, site-specific crop response limits indiscriminate use and precision nutrient systems create a route for technically documented ATS supply.

• Driver: Crop programs that need supplemental sulfur can place ATS inside an existing liquid nitrogen purchase without creating another fertilizer handling decision.
• Restraint: Variable crop response and application compatibility can narrow the economic window for ATS even when sulfur nutrition remains agronomically relevant.
• Opportunity: Metered nutrient programs favor ATS producers that document concentration, mixture behavior and delivery timing for controlled application systems.

Sulfur demand strengthens where crop quality responds to targeted application and the fertilizer remains inside an existing nutrient plan. USDA Agricultural Research Service reported in FY2025 that 30 pounds per acre of sulfur increased soybean seed protein from 37.49% to 38.21% in low-organic-matter soil. The response did not repeat in high-organic-matter soil, so soil nutrient testing becomes commercially relevant before a distributor treats sulfur as routine demand.

Field response is not consistent enough to treat every acre as equal ATS demand. A USDA Agricultural Research Service study published in May 2025 found sulfur fertilizer increased Iowa corn grain yield in only two of twelve study years, even though ATS was one tested sulfur source. Local recommendations and agricultural adjuvant practices therefore influence which applications can support repeat purchasing without eroding grower economics.

Controlled application systems give ATS producers a service route beyond bulk chemical availability. In June 2025 MAFRA designated KOAT and KAPE as national smart-farming support centres responsible for training, technology adoption and operating data. ATS vendors can serve similar metered programs by documenting concentration before distributors commit inventory to water soluble fertilizers used in controlled delivery systems at commercial scale.

Which country CAGRs are profiled in the Ammonium Thiosulfate Market?

Country	CAGR
India	9.3%
China	7.5%
USA	7.0%
Germany	6.8%
Italy	6.3%

How do country-level CAGRs compare in the Ammonium Thiosulfate Market?

The profiled CAGRs range from 9.3% in India to 6.3% in Italy, creating a 3.0-percentage-point spread across the five markets. India and China form the faster-growth tier, while the USA, Germany, and Italy show more moderate expansion. Differences in liquid-fertilizer infrastructure, application practices, and nitrogen regulations shape how ATS suppliers can translate market growth into commercial demand.

• India growing agricultural input use and efficient nutrient practices support rising liquid-fertilizer demand.
• China large-scale farming and focus on efficient fertilizer use support liquid-input adoption.
• United States distributors rely on nearby tanks because spring application windows compress fertilizer delivery schedules.
• German nitrogen controls increase scrutiny of application rates and documented fertilizer-use discipline.
• Italian ammonia controls keep fertilizer placement under closer regulatory and operating scrutiny

Similar CAGRs can produce different entry economics, so producers need country-specific channel plans. The full report provides country-level CAGR analysis across North America, Latin America, Europe, East Asia, South Asia, Oceania and the Middle East and Africa.

Country-wise Analysis

• India represents the fastest-growing market in the group, with ammonium thiosulfate demand expected to expand at 9.3% CAGR through 2036. Rising fertilizer consumption, improving nutrient-management practices, and wider use of efficient application methods are creating favorable conditions for ATS adoption. Suppliers can capture this growth by strengthening distribution coverage and offering crop-specific nutrient solutions.
• China’s large cultivated area provides a substantial base for liquid fertilizer consumption, while efforts to improve fertilizer efficiency are reshaping purchasing priorities. The ammonium thiosulfate market is projected to grow at 7.5% CAGR through 2036. Demand opportunities will increasingly favor suppliers that connect ATS use with precise nutrient dosing, productivity gains, and improved fertilizer utilization.
• Fertilizer purchasing in the USA is strongly influenced by tight planting schedules, making product availability and delivery speed critical during peak seasons. Ammonium thiosulfate demand is forecast to increase at 7.0% CAGR through 2036, supported by mature liquid-fertilizer dealer networks and storage infrastructure. Regional inventory, blending capability, and timely application support can therefore help distributors convert sulfur requirements into recurring ATS sales.
• German fertilizer users face greater pressure to demonstrate efficient nitrogen management and limit unnecessary nutrient losses. With ammonium thiosulfate demand expected to rise at 6.8% CAGR through 2036, ATS suppliers have room to position sulfur nutrition within precision-oriented fertilizer programs. Clear application guidance and compatibility with existing nutrient plans will remain important for market development.
• Italian fertilizer decisions face direct scrutiny over ammonia losses from agriculture, which raises the commercial importance of placement and rate discipline for nitrogen-bearing products. Ammonium thiosulfate sales in Italy are forecast to expand at 6.3% CAGR by 2036 despite environmental pressure, and ISPRA’s 2025 inventory recorded agriculture at 91.4% of national ammonia emissions during 2023 under the national inventory framework. The emissions profile does not eliminate sulfur demand but narrows acceptable application practice, so ATS providers need documented handling and crop-aligned recommendations that let distributors defend nutrient value without encouraging unnecessary nitrogen application during routine farm planning and distributor review.

Who are the notable companies in the Ammonium Thiosulfate Market?

Tessenderlo Group NV, Koch Fertilizer LLC, Martin Midstream Partners L.P., TIB Chemicals AG, Esseco S.r.l., Kugler Company, Phillips 66 Company, and J Westling & Co. are the notable companies profiled in this market.

Competition depends on sulfur feedstock, bulk liquid handling and reliable fertilizer-channel access. Tessenderlo Group NV and Koch Fertilizer LLC pair ATS with fertilizer networks. Martin Midstream Partners L.P. and Phillips 66 Company use sulfur-processing assets, while regional specialists compete through fertilizer market channels.

• Integrated ATS positions include Tessenderlo Group NV, Koch Fertilizer LLC, Martin Midstream Partners L.P. and Phillips 66 Company.
• TIB Chemicals AG, Esseco S.r.l. and Kugler Company serve specialty chemistry or regional fertilizer distribution channels.
• J Westling & Co. represents planned Nebraska capacity aimed at regional Western Corn Belt fertilizer demand.

Competitive Benchmarking: Ammonium Thiosulfate Market

Company	Direct ATS Route	Bulk Liquid Handling	Fertilizer Channel Integration	Geographic Reach
Tessenderlo Group NV	High	High	High	North America and Europe
Koch Fertilizer LLC	High	High	High	United States and Canada
Martin Midstream Partners L.P.	Medium	High	Medium	Mid-South and Southeastern United States
TIB Chemicals AG	High	Medium	Medium	Europe and North America
Esseco S.r.l.	Medium	Medium	Medium	Europe and export markets
Kugler Company	Medium	Medium	High	United States and international shipments
Phillips 66 Company	Medium	Medium	Low	United States
J Westling & Co.	Medium	Low	Medium	Nebraska and planned Western Corn Belt reach

Scoring basis: High Direct ATS Route requires multiple verified forms or dedicated capacity, Medium one established route and Low a planned route. High Bulk Liquid Handling requires production plus storage, Medium one controlled step and Low limited infrastructure. High Fertilizer Channel Integration requires field support plus distribution, Medium a narrower channel and Low limited crop-facing evidence.

Key Developments in the Ammonium Thiosulfate Market

• In July 2026, Phillips 66 Company received renewed Title V operating permit OP2619-20 for the Billings refinery, whose permitted sulfur-recovery facility includes an ammonium thiosulfate unit.
• In July 2026, J Westling & Co. signed a technology agreement with Topsoe for Project Meadowlark, whose planned fertilizer output includes 140,000 tons of ammonium thiosulfate per year.
• In February 2026, Martin Midstream Partners L.P. filed its 2025 Form 10-K and confirmed continued ammonium thiosulfate production at the Neches terminal in Beaumont, Texas.

Key Players in the Ammonium Thiosulfate Market

Integrated ATS Supply and Sulfur Processing

• Tessenderlo Group NV
• Koch Fertilizer LLC
• Martin Midstream Partners L.P.
• Phillips 66 Company

Specialty and Regional ATS Supply

• TIB Chemicals AG
• Esseco S.r.l.
• Kugler Company

Development-Stage Domestic Capacity

• J Westling & Co.

Ammonium Thiosulfate Market - Report Scope

Coverage field	Report scope
Market breakdown	By form, grade, end use and region.
Quantitative Units	USD Million.
Market Definition	Commercial ammonium thiosulfate sold as solid or liquid material for fertilizer, photochemical, mining and other qualified uses.
Regions Covered	North America, Latin America, Europe, East Asia, South Asia and Pacific, and Middle East and Africa.
Countries Covered	United States, Brazil, Germany, South Korea, Italy, and 20+ countries included in the full report.
Key Companies Profiled	Tessenderlo Group NV, Koch Fertilizer LLC, Martin Midstream Partners L.P., TIB Chemicals AG, Esseco S.r.l., Kugler Company, Phillips 66 Company, J Westling & Co.
Forecast Period	2026 to 2036.
Approach	Primary and secondary research with market triangulation.

Ammonium Thiosulfate Market - Research Methodology

Method	Approach
Primary Research	FMI analysts gathered input from manufacturers, service providers, technology developers, distributors, end users, procurement teams, and subject-matter experts. Interviews examined purchasing decisions, product or service evaluation, adoption barriers, approval requirements, pricing considerations, and expectations for technical or commercial support. Respondents were also asked what evidence is required before a trial, pilot, or initial order develops into regular purchasing.
Desk Research	Desk research covered government statistics, regulatory publications, trade data, industry associations, technical literature, standards, company filings, product information, and official corporate announcements. Sources were reviewed for relevance, publication date, geographic coverage, and consistency with the defined market scope. Claims relating to performance, applications, approvals, capacity, investment, and commercial activity were retained only when supported by credible public evidence.
Market Sizing and Forecasting	The market model combined the baseline value with historical performance, segment structure, pricing and volume indicators, adoption levels, company participation, and country-level demand conditions. Forecast assumptions considered economic activity, investment trends, regulatory developments, technology adoption, purchasing cycles, supply availability, and barriers to wider market use. Segment and regional estimates were reconciled before the final market total was calculated.
Data Validation	Estimates were checked against multiple independent indicators, including public data, company activity, trade patterns, industry developments, and findings from primary interviews. Validation also tested whether products, services, applications, and company revenues fell within the defined market boundaries. Adjacent categories, unsupported claims, overlapping revenues, and activities without direct market relevance were excluded to reduce double counting and maintain consistency across segments and countries.

Ammonium Thiosulfate Market by Segments

Ammonium Thiosulfate Market segmented by Form:

• Solid Form
• Liquid Form

Ammonium Thiosulfate Market segmented by Grade:

• Industrial Grade
• Photo Grade

Ammonium Thiosulfate Market segmented by End Use:

• Fertilizers
• Others
• Photochemicals
• Mining

Ammonium Thiosulfate Market by Region:

• North America
  • United States
  • Canada
• Latin America
  • Brazil
  • Mexico
  • Chile
  • Rest of Latin America
• Western Europe
  • Germany
  • United Kingdom
  • Italy
  • Spain
  • France
  • Nordics
  • Benelux
  • Rest of Western Europe
• Eastern Europe
  • Russia
  • Poland
  • Hungary
  • Balkan and Baltic States
  • Rest of Eastern Europe
• East Asia
  • China
  • Japan
  • South Korea
• South Asia and Pacific
  • India
  • ASEAN
  • Australia and New Zealand
  • Rest of South Asia and Pacific
• Middle East and Africa
  • Kingdom of Saudi Arabia
  • Other GCC Countries
  • Türkiye
  • South Africa
  • Other African Union Countries
  • Rest of Middle East and Africa

Research Sources and Bibliography

• Montana Department of Environmental Quality. (2026, February 4). Title V Operating Permit OP2619-19: Phillips 66 Company - Billings Refinery.
• Ministry of Agriculture, Food and Rural Affairs, Republic of Korea. (2025, February 27). S. Korea’s First Master Plan for Promotion of the Growth of the Smart-Farming Industry for the Years 2025-2029.
• TIB Chemicals AG. (2025, January 31). Acquisition of US-based REAXIS Inc.
• Esseco S.r.l. (2025, November). Sustainability Report 2024.
• Koch Fertilizer LLC. (2025, May 14). Four Sites Earn 2024 Energy Star Certification.
• USA Department of Agriculture, Agricultural Research Service. (2025). Sulfur improves seed protein concentration in some environments in the Southeast USA
• USA Department of Agriculture, Agricultural Research Service. (2025, May 19). Long-term field study on corn response to sulfur fertilization in Iowa, USA.
• Ministry of Agriculture, Food and Rural Affairs, Republic of Korea. (2025, June 17). S. Korea Accelerates Turning Agricultural Production into Smart Farming through Smart Farming Support Centres.
• USA Department of Agriculture, Economic Research Service. (2025, March 27). Fertilizer prices stable at onset of 2025 planting season, below highs of 2021 and 2022.
• National Fertilizer Association of Brazil (ANDA). (2026, April 2). Fertilizer Market Report - January 2026.
• German Environment Agency. (2026). Indicator: Agricultural nitrogen surplus.
• Ministry of Agriculture, Food and Rural Affairs, Republic of Korea. (2026, May 6). Full-Scale Rollout of AI-Driven Innovation on Farms.
• ISPRA. (2025). Italian Informative Inventory Report 2025: Agriculture.
• Montana Department of Environmental Quality. (2026, July 31). Phillips 66 Company - Billings Refinery Title V Operating Permit OP2619-20.
• Topsoe. (2026, July 9). Topsoe lands technology contract for pioneering blue ammonia fertilizer project.
• Martin Midstream Partners L.P. (2026, February 23). Annual Report on Form 10-K for the year ended December 31, 2025.
• Tessenderlo Kerley, Inc. (2025, August 21). New Tessenderlo Kerley Plant Brings Innovation and Opportunity to Defiance, Ohio.
• Koch Fertilizer LLC. (2026, April 22). Five Koch Fertilizer Plants Earn 2025 ENERGY STAR Certification.
• TIB Chemicals AG. (2025, December 11). Reaxis Inc. becomes TIB Chemical Corporation.
• Delek US Holdings, Inc. (2026, April 29). Quarterly Report on Form 10-Q for the quarter ended March 31, 2026.
• Central Platte Natural Resources District. (2026, July 23). Board of Directors Meeting Notes.
• Martin Midstream Partners L.P. (2026, July 27). Quarterly Report on Form 10-Q for the quarter ended June 30, 2026.
• Texas Commission on Environmental Quality. (2025). Plain Language Summary for New Source Review (NSR) Renewal Application for Air New Source Review Permit Number 20020.
• Hydrite Chemical Co. (2025, September 3). Hydrite Announces the Acquisition of Enterprise Specialty Products, Inc. and Expansion to the US Southeast Region.
• Hydrite Chemical Co. (2026). Hydrite Company History.

This bibliography is provided for reader reference and is not exhaustive. The full report contains the complete reference list and detailed citations

This Report Answers

• How large is the ammonium thiosulfate market in 2026 and 2036?
• Which operating conditions support repeat demand for ammonium thiosulfate in fertilizer programs?
• Why does solid form hold the leading share within the form category?
• Why does industrial grade account for most grade demand in 2026?
• How do fertilizer applications influence ammonium thiosulfate purchasing and seasonal logistics?
• How do country growth rates differ among the five profiled national markets?
• Which companies provide direct ATS production, sulfur conversion or regional liquid-fertilizer channels?
• What limits ammonium thiosulfate economics at the field and distribution level?
• What should formulators and distributors compare before committing seasonal ammonium thiosulfate inventory?