Ammonium Sulfate Price: 2025 Trend + US Market Data

Ammonium Sulfate Price Trend: US Spot Data

US ammonium sulfate spot prices moved from $415 per metric ton in Q4 2024 to $397/MT in Q2 2025, then back up to $435/MT by Q3 2025 — a swing of roughly 9% peak-to-trough within three quarters, per ProcurementResource’s ammonium sulphate price tracker. That is the most current figure captured in this review; ProcurementResource and ChemAnalyst update the series weekly to monthly, so check the source link directly for the latest print before quoting a number to a buyer.

For “ammonium sulphate price trend” and “price of ammonium sulfate fertilizer” queries: no Q1 2025 print is in this dataset, so treat the Q4 2024 → Q2 2025 → Q3 2025 path as the confirmed trend line, not a complete quarter-by-quarter series. Method to get today’s number: USDA AMS publishes weekly fertilizer price reports through its Market News portal — search “ammonium sulfate” or “ammonium sulphate” directly on the AMS site, or pull the current print from the ProcurementResource tracker linked above. Either source beats any number printed here once more than a month has passed.

Ammonium Sulfate Market Size: US and Global

The US ammonium sulfate market segment was worth $1,923.1 million in 2023, per MarketResearchFuture, and is projected to reach $2,373.6 million by 2030 — a 3.1% compound annual growth rate over 2024–2030. That is US-specific segment revenue, not a global figure conflated with it, which matters for anyone searching “us ammonium sulphate market” specifically.

Globally, the ammonium sulfate market is projected to reach $6.02 billion by 2033 at a 6.7% CAGR from 2024, per market aggregators tracked by GMInsights. The global growth rate (6.7%) runs roughly double the US rate (3.1%) — consistent with the US being a mature, saturated market while demand growth concentrates in regions still building out sulfur-deficient soil correction programs.

For readers tracking Asia-Pacific specifically as a comparison point against the US figures above, see our dedicated Asia-Pacific ammonium sulfate market analysis, which covers that region’s demand drivers in depth rather than duplicating them here.

Global Production Volume & Supply Sources

Global ammonium sulfate production reached 32.9 million metric tons in 2024, up from 19.5 million MT in 2009 — a 69% increase over that fifteen-year span, per Statista’s global production dataset. Statista updates this series annually after calendar-year close, typically in January–February, so the 2025 full-year figure should post in early 2026 — check the source link directly rather than assuming 32.9 million MT still holds.

China accounts for roughly 35% of global ammonium sulfate production as of 2024–2025, per MarketResearchFuture’s supply-side analysis. Critically for anyone modeling supply risk: 55–60% of global ammonium sulfate supply comes not from direct synthesis but as a byproduct — of caprolactam manufacturing (nylon precursor), coke-oven operations, and nickel refining. This byproduct dependency means ammonium sulfate supply tracks the health of those unrelated industrial sectors as much as it tracks fertilizer demand; a caprolactam plant slowdown removes fertilizer-grade tonnage from the market regardless of crop-planting cycles.

What is not published: No public USGS Mineral Commodity Summaries data on US domestic production volume was accessible for this review (the USGS page returned an HTTP 403 at time of research). NASS tracks bulk sulfur application but does not break out ammonium sulfate specifically, so crop-level or state-level application rates, acreage treated, and the industrial-vs-agricultural end-use split for US consumption are not available from public USDA/NASS sources. If you need those figures for a specific state or crop, the working method is a direct records request to USDA NASS’s QuickStats tool, cross-referenced against state department of agriculture fertilizer tonnage reports where states require dealer reporting.

Related Markets: Industrial, Thiosulfate & Regional

“Industrial ammonium sulfate market” and “ammonium sulfate market” queries often expect a distinct industrial-use dataset separate from agricultural demand. That split is one of the gaps in public reporting right now: no source in this review breaks out industrial vs. agricultural US consumption separately. What is confirmed is the supply-side split above — the 55–60% byproduct share spans both industrial feedstocks (caprolactam, coke-oven, nickel refining) and the fertilizer-grade output sold into agriculture, so industrial processes are already the dominant source feeding the agricultural market, not a separate parallel market.

For “ammonium thiosulfate market” and “ammonium sulfide market” — these are chemically distinct compounds from ammonium sulfate ((NH₄)₂SO₄). Ammonium thiosulfate (ATS) is a liquid sulfur-nitrogen fertilizer and nitrification inhibitor; ammonium sulfide is primarily an industrial reagent. Neither has verified pricing or market-size data in the research brief for this article, and conflating them with ammonium sulfate pricing would misstate both markets. If you need ATS-specific price data, USDA AMS’s liquid fertilizer price reports track it separately from dry ammonium sulfate.

On US-specific market structure (“us ammonium sulphate market”): the $1,923.1 million 2023 baseline and 3.1% CAGR through 2030 (table above) is the confirmed segment data. No further US-only breakout by state or end-use was available in the sources reviewed.

Agricultural Uses & Application Notes

Ammonium sulfate ((NH₄)₂SO₄) supplies both nitrogen (as NH₄⁺) and sulfur (as SO₄^2-) in one granule, which is why it holds a distinct niche against straight nitrogen products like urea.

• Sulfur-deficient soils: Preferred where soil tests show low sulfate-sulfur, common on sandy, low-organic-matter fields that have seen reduced atmospheric sulfur deposition since power-plant emissions controls tightened.
• High-pH or calcareous soils: Its acidifying effect helps correct alkalinity over repeated seasons — the reverse of what's needed on already-acidic soils, where it should be used cautiously or paired with lime.
• Crops favoring it: Cereals, oilseeds (canola, soybeans), forage, and fruit crops with above-average sulfur demand for protein and oil synthesis.
• Fertigation compatibility: High water solubility makes it suitable for drip and pivot-irrigation nutrient programs where precise timing matters.

What is not published: no USDA/NASS data breaks out application rates by crop or state specifically for ammonium sulfate (NASS tracks bulk sulfur, not by formulation), and no acreage-treated or adoption-percentage figures for this specific product exist in public USDA datasets. To size demand for your own operation, the working method is a state extension soil-test recommendation combined with your own soil lab's sulfur reading — not a national average, since sulfur deficiency is highly field-specific.

What Moves the Price

Four factors explain the $415 → $397 → $435 per MT path across Q4 2024–Q3 2025, and they are the same factors to watch going forward — this list is the durable part of this article, independent of which quarter you're reading it in:

1. Byproduct supply swings: Since 55–60% of global supply rides on caprolactam, coke-oven, and nickel-refining output (not dedicated ammonium sulfate plants), a slowdown in any of those unrelated industries tightens fertilizer-grade supply independent of farm demand.
2. Natural gas and energy costs: Direct-synthesis production (ammonia + sulfuric acid) is energy-intensive; feedstock and energy price swings pass through to spot quotes.
3. China's ~35% production share: Chinese export policy, domestic demand, and plant operating rates move a large enough share of global supply to shift US spot pricing.
4. Seasonal demand timing: Pre-planting order surges in spring and fall create predictable short-term price pressure independent of the underlying supply trend.

How to verify current conditions: cross-check the USDA AMS weekly fertilizer report against ProcurementResource's tracker; if the two diverge by more than a few percent, one is lagging the other's data collection window and the more recent print should govern purchasing decisions.

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Conclusion & Next Steps

The confirmed numbers: US spot price $435/MT in Q3 2025 (from $397/MT in Q2, $415/MT in Q4 2024); US market $1,923.1M in 2023 growing to a projected $2,373.6M by 2030 at 3.1% CAGR; global production 32.9 million MT in 2024, up from 19.5 million MT in 2009; and 55–60% of global supply riding on byproduct streams outside dedicated fertilizer production. That last figure is the one durable lens for reading any future price move: when caprolactam, coke-oven, or nickel-refining output shifts, ammonium sulfate supply shifts with it, regardless of farm-side demand.

To keep these numbers current: check ProcurementResource's tracker and USDA AMS's weekly report for spot pricing, Statista's annual release (posts January–February) for production volume, and MarketResearchFuture or Grand View Research's annual updates for market-size revisions.

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