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Copper king Chile faces acid supply crunch as China exports dry up
China's exports of sulphuric acid to Chile dwindled to zero in March, Chinese customs data show, leaving the world's top copper producing nation facing a squeeze on supplies of the chemical used to make around half of its refined metal. The war in the Middle East has caused a sulphur supply crunch, and China is reportedly planning to ban sulphuric acid exports from May to ensure its domestic market - notably the fertiliser industry - does not face a shortage. But shipments to Chile, which was China's biggest overseas acid market in 2025 and took almost one-third of its exports, have already dried up, with no acid ... (full story)