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China holds a commanding position in the global sulphur market, clearly dominating the supply chain. In 2025, China produced approximately 19 million metric tons of sulphur-far exceeding other major producers. In comparison, the United States produced around 8 million tons, Russia about 7.5 million tons, and Saudi Arabia close to 7.2 million tons. Other contributors like the UAE, Canada, Kazakhstan, India, South Korea, and Qatar operate at much smaller scales. This significant gap highlights one key reality—China is not just another supplier; it is the most influential force in the sulphur market. As a result, even minor policy shifts, such as export restrictions, can quickly disrupt global supply and create ripple effects across industries like mining, agriculture, and chemicals.
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Impact on Copper and Silver Supply
Sulphuric Acid plays a critical role in copper production. When it becomes expensive or scarce, copper output slows down and costs rise. In heap leaching operations, roughly 1.5 to 3 tons of sulphuric acid are required to produce just 1 ton of copper, depending on ore quality and extraction methods.
This means even small disruptions in acid availability can significantly affect production economics. Some Chinese smelters may cut output or adjust operations due to rising costs, triggering a chain reaction higher costs lead to lower copper production.
Since nearly 70% of global silver is produced as a by-product of copper mining, any slowdown in copper production directly tightens silver supply. In simple terms, weaker copper output naturally leads to reduced silver availability.
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Impact on Food Prices and Agriculture
The effects go beyond metals and extend into global food systems. Around 50% of sulphuric acid is used in fertilizer production, making it essential for agriculture and crop yields.
Fertilizer markets are already under pressure, with global prices rising by about 15% in 2025 due to strong demand and supply constraints. If China restricts sulphur or sulphuric acid exports, global supply could tighten further, increasing fertilizer costs. These higher input costs may eventually pass on to farmers, contributing to rising food prices and inflation.
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Conclusion
China’s sulphuric acid export restrictions may appear to be a minor policy change, but their impact is far-reaching. From supporting global food production through fertilizers to driving copper and silver supply, sulphuric acid is a critical link across multiple industries.
With China as the dominant producer, even small policy shifts can disrupt global markets. Ultimately, this situation highlights how deeply interconnected modern supply chains are and how a single decision in one country can influence economies worldwide.