The Invisible War: How China Turned a Chemical into a Strategic Weapon

Everyone is watching the oil price. Everyone is fixated on the tankers stuck outside the Strait of Hormuz. But the real move—the one that will ripple through every factory, every farm, and every dinner table—is happening somewhere else entirely.

China just pulled a lever on a substance most people have never heard of. Yet without it, the bread on your table doesn't get grown. The copper in your electrical wiring doesn't get refined. The lithium-ion battery in your electric vehicle doesn't get manufactured. The microchip in your phone doesn't get etched.

That substance is sulfuric acid. And starting May 1, 2026, the world's largest exporter is turning off the tap.

A Chemical That Touches Everything

Sulfuric acid is the quiet workhorse of modern industry. It is the most widely produced chemical on Earth, not because it is flashy, but because it is foundational. Consider these numbers:

• 60-70% of global sulfuric acid production goes to fertilizer manufacturing. No sulfuric acid means no phosphate fertilizers. No phosphate fertilizers means lower crop yields. Lower yields mean higher food prices.

• 20% of the world's copper production depends on sulfuric acid for leaching processes.

• 50% of global uranium production relies on it.

• 30% of nickel production requires it.

The battery in your EV? High-pressure acid leaching—which consumes 25 to 30 tons of sulfuric acid per ton of nickel—is essential for refining battery-grade materials.

From agriculture to mining to semiconductors, sulfuric acid sits at the very beginning of nearly every industrial supply chain. When the first link breaks, everything downstream feels it.

The First Cut: Hormuz Closes

The current crisis began with a geopolitical shock. When Iran retaliated against US and Israeli strikes by blockading the Strait of Hormuz in late February 2026, the world focused on oil. But the real damage was elsewhere.

Forty-four percent of globally traded sulfur—the raw material from which sulfuric acid is produced—passes through the Strait. The Arabian Gulf is the global price setter for sulfur, and suddenly, that price setter went silent.

The data is staggering. Overall bulk commodity shipments through the strait fell 93% in March compared to February, dropping from nearly five million tons to just 326,000. Fertilizer shipments collapsed 92%, from over a million tons to just 82,000. What typically takes days now takes weeks or months. War-risk insurance premiums have skyrocketed from 0.25% to as high as 10% of vessel value.

The United Nations Food and Agriculture Organization has warned that this is not merely an energy shock, but a systematic shock affecting agrifood systems globally.

And then came the price shock. Sulfur, which traded at around $101 per ton in mid-2024, has surged past $700—a sevenfold increase in just two years. In 2025 alone, sulfur prices rose 126.65%, from an average of 1,092 yuan per ton to over 2,474 yuan. Sulfuric acid prices have followed, climbing more than 300% over the same period.

The Second Cut: China Closes the Door

Just as the global market was reeling from the Hormuz blockade, China made its move.

Beijing has signaled that starting May 1, 2026, it will suspend all ordinary sulfuric acid exports. Only electronic-grade acid will be permitted, and that only with special approval. The measures are expected to remain in place at least through the end of the year.

China is not a minor player in this market. It is the world's largest sulfuric acid exporter. In 2025 alone, China exported over 4.6 million tons of sulfuric acid, valued at $290 million. Its primary destinations—Chile, Indonesia, Saudi Arabia, Morocco, and India—span the globe.

Now, two major supply sources are offline simultaneously. The Middle East, source of 44% of global sulfur, is effectively blocked. And China, the world's largest finished acid exporter, has voluntarily withdrawn from the market.

This is not a coincidence. It is a coordinated vulnerability.

Who Feels the Pain First?

• Chile: The world's largest copper producer imports more than one million tons of sulfuric acid from China every year. Approximately 20% of its copper production—about 1.1 million tons annually—depends on acid-leaching processes. Chilean sulfuric acid prices have already surged 44% in the last month, even before the Chinese ban takes effect. If the suspension is enforced for the full year, Chilean miners will face even higher prices and potential production cuts.

• Indonesia: The global nickel powerhouse relies on high-pressure acid leaching for its battery-grade nickel production. Each ton of nickel requires 25 to 30 tons of sulfuric acid, and acid costs already represent 52% of HPAL processing costs. Indonesia imported 5.3 million tons of sulfur in 2025, with over 4 million tons coming from the Middle East. Sixty percent of its finished acid imports come from China. Analysts warn that Indonesian nickel producers may begin running out of sulfur stockpiles as early as May or June 2026.

• The Copper Belt of Africa: The Democratic Republic of Congo and Zambia, major copper producers, face similar pressures. The DRC imported approximately 1.4 million tons of sulfur in 2025, 90% of it from the Middle East. Zambia has already imposed its own sulfuric acid export restrictions. Consulting firm CRU warns that the loss of Chinese volumes will be extremely difficult to replace, given the parallel shortage of sulfur feedstock.

The Real Crisis: Food

As severe as the industrial impacts are, the most dangerous consequence lies elsewhere. The FAO's Chief Economist has warned that the disruption to the Strait of Hormuz is triggering one of the most severe shocks to global commodity flows in recent years, with significant implications for food security.

The connection is direct and unavoidable. Sulfuric acid is used to process phosphate rock into phosphate fertilizers. Without those fertilizers, crop yields decline. FAO projections indicate that global fertilizer prices could average 15 to 20% higher in the first half of 2026 if the crisis persists.

Farmers face a dual cost shock: more expensive fertilizers alongside rising fuel costs affecting irrigation, transport, and every link in the agricultural value chain. Many producers are likely to reduce fertilizer application or shift toward less input-intensive crops. But fertilizer use follows a nonlinear yield response—even modest reductions can result in disproportionately large declines in crop yields, particularly in regions where baseline usage is already low.

If the disruption persists for three months or longer, the FAO warns of reduced yields for wheat, rice, and maize, crop substitution, and increased competition from biofuel production as higher oil prices stimulate demand for agricultural feedstocks.

This is not a distant theoretical risk. The World Food Programme has already seen its shipping costs rise 18% since the war began. And the spring planting season of 2026 is fast approaching.

The Pattern: China's Strategic Playbook

This is not the first time China has used export restrictions as a strategic lever. The pattern is now familiar.

In October 2025, China announced new restrictions on silver exports. The mere announcement—before any actual curtailment—sent silver prices from $30 to $84 per ounce, a 142% increase in just three months. Tesla CEO Elon Musk publicly criticized the move, stating, "This is not good. Silver is needed in many industrial processes".

Before that, China had restricted exports of gallium, germanium, tungsten, and antimony—each time with similar price effects.

But sulfuric acid is different. It is not a niche metal used in specific high-tech applications. It is the lifeblood of global industry and agriculture. When China restricts sulfuric acid exports, it is not targeting one sector. It is targeting the entire global economy's production floor.

Why Now?

The timing is not accidental. China has its own priorities, and at the top of that list is food security. With the Hormuz blockade threatening global fertilizer supply chains, Beijing is securing domestic supply first. Lynn Song, chief economist for Greater China at ING, noted, "I'd imagine the intention would be to secure fertiliser supply, which is currently at risk thanks to the blockage of the Strait of Hormuz". For Beijing, the contribution of sulfuric acid exports to GDP is far less important than the broader goal of safeguarding food security.

But there is likely another layer to this calculus. By withdrawing from the global market at the same moment that Middle Eastern supply has collapsed, China is not just protecting itself. It is also, deliberately or not, accelerating the price shock that will ripple through the industrial and agricultural supply chains of its geopolitical rivals.

The Enzac Assessment: No Quick Fix

The critical insight for investors and strategists is that this dual supply shock is not easily resolved.

First, the sulfur that cannot leave the Middle East is not simply delayed—it is effectively offline. Even if Hormuz reopened tomorrow, normal shipping conditions could take months to resume. Insurance costs and logistical disruptions will not vanish overnight.

Second, China's export ban has no obvious substitute. Other producers cannot quickly ramp up sulfuric acid production to fill the gap because the feedstock sulfur itself is in short supply. The entire chain is broken at its origin.

Third, the impact will be nonlinear. Copper and nickel producers have reported sulfur stockpiles of only 30 to 60 days. When those buffers run out, production cuts become unavoidable. And when copper production falls, the energy transition slows. Electric vehicles, solar panels, wind turbines, grid infrastructure—all depend on copper.

Fourth, the food price shock may take longer to materialize, but it will be more politically destabilizing. Fertilizer shortages in the spring planting season translate directly to lower harvests and higher food prices in the fall. In a world already grappling with inflation, that is a recipe for social unrest.

The Bottom Line

The world has been focused on the tankers stuck at Hormuz and the trajectory of oil prices. But the real story is unfolding in a chemical plant, not an oil field.

China has turned a mundane industrial chemical into a strategic weapon. By withdrawing from the global sulfuric acid market at the exact moment when Middle Eastern supply has collapsed, Beijing has engineered a supply shock that will touch everything from the price of bread to the cost of electric vehicles.

This is not a temporary disruption. This is a structural shift in how global supply chains operate. And the full consequences have not yet begun to unfold.

The Enzac Research team will continue monitoring the sulfur and sulfuric acid markets, the response from copper and nickel producers, and the emerging impact on global fertilizer supply chains. The crisis at Hormuz is not just about oil. It is about the invisible foundations of modern industrial civilization. And those foundations are cracking.