China Dominance Reshapes Global Ammonium Sulfate Prices

Ammonium sulfate, a key nitrogen fertilizer widely used in agriculture and industrial applications, has become increasingly shaped by China's dominant role in global supply and evolving international pricing dynamics. As China deepens its participation in global competition, international pricing mechanisms and trade policies are undergoing continuous adjustment, with significant implications for overseas market development.

China Emerges As The Core Global Supplier

Global ammonium sulfate capacity has expanded rapidly from 26.68 million tons in 2021 to 43.62 million tons in 2025, reflecting a compound annual growth rate of 13.1%. China's share of global capacity has increased from 53% to 63% over the same period, making it the central driver of global supply expansion.

China's production growth rate of 18.9% far exceeds the 5.6% growth rate outside China, underscoring its structural dominance in incremental supply.

Exports have become the primary channel for absorbing domestic output. China's ammonium sulfate is largely produced as a by-product from caprolactam, coking, and phosphate-based operations. Rapid expansion in caprolactam capacity and stricter environmental standards have further accelerated output growth. Due to persistent supply-demand mismatches, China's average export dependence reached 81.7% between 2021 and 2025.

As a by-product material, output fluctuates more with upstream industrial production than with direct fertilizer demand, increasing reliance on international markets for balancing supply.

Global Trade Structure Highly Concentrated In China

China accounts for more than 95% of global ammonium sulfate exports, making it the dominant global supplier.

Demand is concentrated across four major regions:

South America, led by Brazil, recorded a 21% annual demand growth rate from 2021 to 2025, with all supply sourced from China.

Asia posted a 6.3% growth rate, with Myanmar and India showing strong expansion, while Vietnam and Malaysia experienced declines. China holds a 94% share in this market.

Turkey, representing Europe's key demand center, grew at 22% annually, with China supplying 98% of imports.

Africa recorded a 10.5% growth rate, driven by South Africa and Nigeria, with China supplying 96% of demand.

Overall, China accounts for more than 60% of global capacity, nearly 90% export dependence, and over 95% of global trade. Export flows remain the critical balancing mechanism for both upstream production stability and downstream market equilibrium.

Price Formation Shifts Under Structural And Geopolitical Pressure

Seasonal Patterns Weaken As Geopolitics Intensify

Traditional seasonality in ammonium sulfate pricing has weakened. Southeast Asia demand typically peaks between July and September due to rainfall-driven fertilizer cycles, while Brazil's peak demand occurs between August and December aligned with soybean and corn planting.

However, rising Chinese capacity has led exporters to increasingly adopt storage leasing in destination markets such as Brazil and "floating cargo" sales models, where shipments are sold during transit. Importers have also shifted from concentrated seasonal purchasing to demand-based procurement, reducing seasonal price signals between 2023 and 2025.

Geopolitical shocks have become a stronger price driver. The COVID-19 pandemic in 2021 triggered supply chain disruptions and pushed global prices up more than 80%. The Russia-Ukraine conflict in 2022 restricted Russian fertilizer exports, lifting prices by up to 50%. In 2026, tensions involving the US and Iran threatening the Strait of Hormuz disrupted roughly one-third of global nitrogen fertilizer trade, driving prices up more than 60%.

Price Range Narrows In Normal Conditions

Between 2023 and 2025, ammonium sulfate crystal prices showed a narrowing volatility structure under relatively stable external conditions.

Key characteristics include:

• Rising price floors and capped ceilings, with lows at 102, 118, and 132 USD/ton respectively

• Peaks remaining below 185 USD/ton

• Volatility narrowing to 76%, 24%, and 40% across 2023–2025

• Reduced time above average price levels: 190 days in 2023, 209 days in 2024, and 161 days in 2025

Overall, prices increasingly exhibit a bounded range, with extended periods trading below average levels and limited upside momentum.

Crystal And Granular Pricing Mechanisms Diverge

The spread between granular and crystal ammonium sulfate has narrowed significantly. Granular product is processed from crystal material, with 2025 crystal capacity reaching 27 million tons per year and granular capacity exceeding 28 million tons, resulting in structural oversupply in granular form.

Granular demand is largely concentrated in Brazil, while Southeast Asia and Australia-New Zealand markets primarily consume crystal products.

The price spread has shifted sharply:

• 2022 average spread: 46 USD/ton premium for granular

• 2026 average spread: -9.3 USD/ton

• During the US-Iran conflict period: as low as -35 USD/ton, with finished product pricing below raw material costs

Pricing mechanisms have also diverged. Crystal exports to Southeast Asia are typically priced as cost-plus export pricing based on Chinese domestic levels, with stable spreads of 20–26 USD/ton between 2020 and 2025, reaching up to 38 USD/ton in 2026.

Granular pricing is more volatile due to international arbitrage. China's pricing is based on crystal benchmarks, while Brazil references urea and ammonium sulfate substitution ratios. During periods of falling urea prices, Brazilian import prices weakened sharply, in some cases dropping 20–29 USD/ton below Chinese FOB levels.

China's granular market has shifted from surplus buyer conditions toward a buyer-dominated structure, with China–Brazil average spreads narrowing from 62 USD/ton in 2022 to 14 USD/ton in 2026.

Granular products also show asymmetric sensitivity to geopolitical shocks. Crystal prices rose 59.7% from pre-conflict levels (Feb 28), while granular rose 47%. On the downside, crystal fell 22% from mid-June levels, while granular declined 24%, reflecting weaker upside sensitivity and stronger downside rigidity due to oversupply.

Urea Linkage Weakens Amid Structural Oversupply

Ammonium sulfate pricing correlation with urea has become increasingly unstable. During geopolitical tightening, urea prices — driven by disruptions involving major exporters such as Russia and Iran and potential Strait of Hormuz closures — tend to rise first, transmitting upward pressure to ammonium sulfate and widening spreads.

When tensions ease, urea prices decline earlier, and ammonium sulfate follows normalization.

Correlation coefficients were 0.95 in 2021, 0.89 in 2022, and 0.95 in 2026, indicating strong linkage during stress periods. However, in 2024 and 2025, ammonium sulfate remained depressed due to oversupply, weakening correlation to 0.63 in 2025.

This indicates that urea functions as a leading indicator during geopolitical tightening, while ammonium sulfate price behavior becomes more supply-driven under stable conditions.

Trade Policies And Regulatory Pressure Intensify

Major importing countries have introduced multiple trade management measures affecting ammonium sulfate flows.

Mexico reinstated anti-dumping duties of 181 USD/ton on Chinese imports on November 24, 2025.

Brazil enforces nitrogen content requirements of 20.5%–21%. Vietnam requires a minimum nitrogen content of 21%. Thailand imposes strict packaging standards requiring polyethylene-lined woven bags of at least 0.08 mm thickness, with net weight not exceeding 50 kg per bag.

Brazilian state-level taxation also affects costs. In Mato Grosso, a major soybean-producing region, agricultural input import tax rates increased from 1% to 4% in 2024, raising landed costs for importers.

China's fertilizer export controls vary by product. Urea exports were subject to inspection and quota controls in 2024, with volumes falling from 4.25 million tons in 2023 to 260,000 tons in 2024, and prices declining 27% from early-year levels. Ammonium chloride was added to export inspection controls in 2021, with exports falling from 1.22 million tons in 2021 to 360,000 tons in 2022. Phosphate fertilizers are governed by a strict multi-layer system including inspection, quotas, seasonal windows, and tariffs, with export suspensions during peak agricultural periods such as March 14 to August 31, 2026.

Ammonium sulfate remains the only major fertilizer product in China without formal export inspection controls. However, market expectations of potential regulatory tightening in April–May 2026 have already weighed on prices, reducing buyer willingness and liquidity while triggering price declines.

Outlook And Strategic Implications

Industry participants are advised to strengthen self-regulation mechanisms and foster orderly competition through coordination platforms involving producers and traders. Differentiated strategies based on product grading, quality improvement, and packaging upgrades are encouraged to shift competition from price-based to quality-driven dynamics.

Greater emphasis is being placed on geopolitical monitoring and country-specific policy analysis, particularly in the Middle East, Eastern Europe, and major import markets such as Brazil, Southeast Asia, Turkey, and South Africa. Monitoring of trade defense measures, tax policies, and China's export control scenarios is increasingly critical for risk management.

Market participants are also advised to capture arbitrage opportunities arising from price corrections following geopolitical easing. As spreads between origin and destination markets, as well as between granular and crystal products and between ammonium sulfate and urea, normalize, traders may consider building inventory during low-price phases and releasing cargo gradually during peak demand periods.

Given persistent structural oversupply, a "low inventory, fast turnover" operating model is increasingly viewed as necessary to mitigate downside risk in a market characterized by narrow price bands and prolonged low-level oscillations.