Global Sulfuric Acid Demand: Key Drivers in the Fertilizer Industry

Sulfuric acid is one of the most important industrial chemicals in the global fertilizer supply chain. Its strongest connection to agriculture comes from phosphate fertilizer production, where sulfuric acid is essential for converting phosphate rock into phosphoric acid and downstream products such as monoammonium phosphate (MAP) and diammonium phosphate (DAP).

As global agriculture responds to population growth, changing dietary patterns, crop intensification, and the need to improve yields, demand for fertilizers continues to influence the market for sulfuric acid. The International Fertilizer Association (IFA) regularly tracks global fertilizer production, consumption, trade, and raw-material markets, highlighting the close relationship between agricultural demand and fertilizer supply chains.

Understanding the main drivers of sulfuric acid demand is therefore important for fertilizer manufacturers, chemical suppliers, traders, and industrial buyers.

The Role of Sulfuric Acid in Fertilizer Production

Sulfuric acid plays a particularly important role in phosphate fertilizer manufacturing. In the wet-process route, phosphate rock reacts with sulfuric acid to produce phosphoric acid. This phosphoric acid can then be processed into several important phosphate fertilizers.

A simplified production chain is:

Phosphate rock → Sulfuric acid → Phosphoric acid → MAP/DAP and other phosphate fertilizers

This makes sulfuric acid a critical input rather than simply a supporting chemical. The IFA’s overview of fertilizer production also explains how sulfuric acid is used to process phosphate rock into phosphoric acid for fertilizer production.

Changes in phosphate fertilizer production can therefore affect sulfuric acid consumption at fertilizer plants.

The U.S. Geological Survey identifies sulfuric acid as the major derivative of sulfur and notes its importance across both industrial and fertilizer complexes.

Key Drivers of Global Sulfuric Acid Demand

Several factors influence sulfuric acid consumption in the fertilizer industry. Some are directly related to fertilizer production, while others affect the broader agricultural supply chain.

1. Growth in Global Fertilizer Consumption

One of the most direct drivers is the overall demand for fertilizers.

Farmers use fertilizers to replace nutrients removed from soil by crops and to support agricultural productivity. When fertilizer consumption increases, manufacturers generally need additional raw materials and intermediates, including sulfuric acid for phosphate fertilizer production.

The IFA maintains global datasets covering fertilizer production, trade, supply, and consumption, demonstrating the scale and international nature of the fertilizer industry.

Growth in agricultural production can therefore create additional demand for phosphate fertilizers and, indirectly, sulfuric acid.

2. Expansion of Phosphate Fertilizer Production

Phosphate fertilizers are one of the most important demand centers for sulfuric acid.

Products such as MAP, DAP, and other phosphate fertilizers depend on phosphoric acid production. Because sulfuric acid is used to process phosphate rock into phosphoric acid, new phosphate fertilizer capacity can increase sulfuric acid requirements. For more information, see our guide on Sulfuric Acid in Agriculture – The Key to Fertilizer Manufacturing.

Countries with large phosphate resources and fertilizer industries can therefore have significant sulfuric acid consumption.

For example, USGS data for Jordan show the close production relationship between phosphate rock, sulfuric acid, phosphoric acid, and DAP. In 2024, Jordan produced approximately 11.5 million metric tons of phosphate rock, 1 million metric tons of sulfuric acid, 297,000 metric tons of phosphoric acid, and 717,000 metric tons of DAP.

3. Global Food Production and Food Security

Agricultural productivity is another fundamental driver.

As countries seek to maintain food supplies while increasing crop yields, fertilizer remains an important agricultural input. Higher crop production can support demand for nitrogen, phosphate, and potassium fertilizers.

Phosphate is particularly important for root development, energy transfer, and several plant growth processes. As a result, fertilizer producers must maintain reliable access to phosphate-related raw materials and processing chemicals.

This creates an indirect link between global food production requirements and sulfuric acid demand.

4. Expansion of Agricultural Land Productivity

Increasing fertilizer demand does not necessarily require a major expansion of farmland.

In many regions, agricultural strategies focus on improving yields from existing land. Fertilizer application can be part of this strategy when soil nutrient availability limits crop productivity.

Higher agricultural intensity can therefore support continued demand for fertilizers and the raw materials required to manufacture them.

This is particularly relevant in regions where population growth and limited arable land create pressure to improve agricultural productivity.

5. Demand for MAP and DAP Fertilizers

MAP and DAP are major phosphate fertilizer products, and their production contributes to sulfuric acid consumption.

When farmers and agricultural markets increase purchases of phosphate fertilizers, producers may increase phosphoric acid and phosphate fertilizer output. This can raise demand for sulfuric acid at integrated fertilizer facilities.

The relationship can be summarized as:

Higher phosphate fertilizer demand → Higher phosphoric acid production → Greater sulfuric acid requirement

However, the relationship is not always one-to-one because fertilizer plants can differ in technology, integration, feedstock, operating rates, and production mix.

6. Regional Fertilizer Capacity Expansion

New fertilizer plants and expansions can have a significant effect on regional sulfuric acid demand.

Integrated fertilizer complexes often produce several products from phosphate rock and other feedstocks. When new phosphoric acid or phosphate fertilizer capacity comes online, additional sulfuric acid production or supply may be required.

This means sulfuric acid demand can shift geographically as investment in fertilizer manufacturing changes.

North Africa and the Middle East, for example, have important phosphate resources and fertilizer production capabilities. USGS data from countries such as Jordan and Tunisia illustrate the scale of phosphate-related production and sulfuric acid use in these regions.

Sulfur Availability and Sulfuric Acid Production

Fertilizer demand is only one side of the sulfuric acid market. Availability and pricing of sulfur feedstocks also affect the ability of producers to manufacture sulfuric acid.

Sulfur can be recovered from petroleum refining and natural gas processing, while sulfuric acid can also be produced from other sulfur-bearing industrial streams.

USGS data show that sulfuric acid represents the dominant end use for sulfur. In its 2026 Mineral Commodity Summaries, the USGS reported that about 90% of U.S. sulfur consumption in 2025 was in the form of sulfuric acid.

This connection between sulfur supply and sulfuric acid production is important for fertilizer manufacturers because disruptions in sulfur availability can affect production costs and supply security.

Energy Costs and Fertilizer Production

Energy prices can also influence sulfuric acid and fertilizer markets.

Fertilizer production is energy-intensive, particularly across integrated chemical complexes. Changes in electricity, natural gas, fuel, transportation, and processing costs can affect fertilizer manufacturing economics.

When production costs rise, fertilizer producers may adjust operating rates, inventories, purchasing strategies, or selling prices. These changes can subsequently influence demand for sulfuric acid.

For industrial buyers, monitoring fertilizer economics alongside sulfur and sulfuric acid prices can provide a broader view of market conditions.

Transportation and Logistics

Sulfuric acid is a hazardous and highly corrosive chemical, making transportation more complex than for many conventional industrial materials.

Fertilizer manufacturers therefore often consider local sulfuric acid production, pipeline connections, storage infrastructure, rail transportation, ports, and specialized tankers when planning supply.

A fertilizer plant located near sulfur or sulfuric acid production can have logistical advantages because shorter transportation distances can reduce freight costs and supply risks.

This is particularly important for large-scale phosphate fertilizer complexes that consume substantial quantities of sulfuric acid.

Regional Differences in Sulfuric Acid Demand

Global demand is not distributed evenly.

Regions with major phosphate rock reserves and large fertilizer manufacturing industries can account for significant sulfuric acid consumption. At the same time, major agricultural markets can drive fertilizer demand even when they have limited domestic production capacity.

This creates international trade flows involving phosphate rock, sulfur, sulfuric acid, phosphoric acid, and finished fertilizers.

For example, USGS data show substantial phosphate and sulfuric acid production in Tunisia, while Jordan combines large-scale phosphate mining with sulfuric acid and fertilizer production.

The Impact of Fertilizer Market Cycles

Sulfuric acid demand can also change with fertilizer market cycles.

Fertilizer markets are affected by several variables, including:

1. Crop prices
2. Farm income
3. Fertilizer affordability
4. Natural gas and energy prices
5. Phosphate rock availability
6. Sulfur supply
7. Freight costs
8. Government agricultural policies
9. Seasonal planting patterns
10. International trade conditions

When fertilizer producers increase operating rates to meet stronger agricultural demand, sulfuric acid consumption can increase accordingly.

Conversely, weaker fertilizer demand can reduce operating rates and temporarily lower sulfuric acid requirements.

Sulfuric Acid Demand and Supply Chain Planning

For fertilizer manufacturers, reliable sulfuric acid supply is an important part of production planning.

A shortage can potentially affect phosphoric acid production and downstream phosphate fertilizer output. For this reason, large fertilizer producers may use long-term supply agreements, integrated sulfuric acid production, diversified suppliers, or strategic inventories to reduce supply risks.

Procurement teams should evaluate more than the quoted sulfuric acid price. Important factors include:

• Acid concentration and quality
• Supply consistency
• Production capacity
• Transportation options
• Storage infrastructure
• Delivery lead times
• Contract terms
• Loading and unloading capabilities
• Safety compliance
• Supplier reliability

A lower nominal price may not necessarily represent a lower total procurement cost if transportation, storage, quality, or supply risks are significantly higher.

Sustainability and Sulfur Recovery

Environmental regulations are also influencing sulfur management.

Sulfur recovery from refining and natural gas processing can provide an important feedstock for sulfuric acid production. At the same time, recovering sulfur from industrial processes can reduce waste and improve resource efficiency.

The USGS reports that significant quantities of spent sulfuric acid are reclaimed from petroleum refining and chemical processes, demonstrating the role of sulfur recovery and acid recycling within the broader sulfur economy.

For fertilizer manufacturers, efficient sulfur management can contribute to both supply security and resource efficiency.

Future Outlook for Sulfuric Acid Demand

The medium-term outlook for fertilizer markets remains closely connected to agricultural demand, fertilizer affordability, production capacity, and global trade.

The IFA’s 2026–2030 fertilizer outlook provides a current framework for assessing expected developments in nitrogen, phosphate, and potash markets.

For sulfuric acid producers and fertilizer manufacturers, several factors will remain important:

• Growth in phosphate fertilizer production
• Expansion of phosphoric acid capacity
• Agricultural productivity requirements
• Regional fertilizer investment
• Sulfur feedstock availability
• Energy and transportation costs
• International fertilizer trade
• Environmental and emissions regulations
• Recycling and sulfur recovery technologies

The strongest structural connection remains the phosphate fertilizer chain. As long as phosphate rock continues to be processed into phosphoric acid through sulfuric-acid-intensive routes, fertilizer production will remain a major influence on sulfuric acid demand.

Conclusion

Global sulfuric acid demand is strongly connected to the fertilizer industry, particularly through phosphate rock processing and phosphoric acid production. Growth in agricultural production, demand for phosphate fertilizers, new fertilizer capacity, regional investment, sulfur availability, energy costs, and logistics all influence this relationship.

For suppliers and buyers, understanding these drivers is essential for evaluating market conditions and developing reliable procurement strategies. The fertilizer sector should therefore remain one of the key areas to monitor when analyzing future sulfuric acid demand.

As global fertilizer markets evolve, changes in phosphate production and agricultural demand will continue to influence the volume, location, and economics of sulfuric acid consumption.