Tightened Chinese Customs Oversight on Indium Stirs AI Hardware Supply Chain Anxieties

Beijing is intensifying its examination of indium exports, prompting anxieties among international purchasers that this niche metal—vital for next-generation data facilities—could be incorporated into the export restrictions that have become a primary instrument in China's trade policy. Accounting for nearly 70% of global indium generation, China yields the metal as a byproduct of zinc processing. Although predominantly utilized in electronic displays and soldering, indium serves as the essential precursor for indium phosphide, a compound critical to manufacturing high-speed optical microchips for artificial intelligence networks. While Beijing officially placed indium phosphide under export regulatory mandates in February 2025, the resulting procurement challenges for advanced data centers prompted the chief executive of Nvidia-backed hardware developer Coherent to accompany President Donald Trump to Beijing in May to directly address the matter.

Although raw indium metal remains absent from China's formal export control registries, multiple procurement entities have reported heightened oversight by Chinese customs authorities. A European purchaser noted a novel requirement to disclose comprehensive end-user details, including geographic location, marking a shift in standard administrative procedures. Similarly, a prominent North American buyer observed that shipment approvals have lengthened from a single day to multiple days due to rigorous documentation reviews, describing the current trading environment as highly strained. While this administrative scrutiny remains inconsistent across the market—with several participants reporting no personal disruptions—industry participants broadly perceive these developments as a potential precursor to comprehensive export restrictions or mapping initiatives designed to identify international supply chain vulnerabilities.

The growing administrative friction underscores a broader strategic concern for Western nations, particularly the United States, which has classified indium as a critical logistical vulnerability. Reflecting these anxieties, the U.S. Defense Logistics Agency recently initiated a procurement strategy aimed at stockpiling as much as 403 metric tons of the metal over a three-year period. Consequently, international buyers increasingly view the newly instituted reporting mandates not as isolated customs procedures, but rather as an indicators of impending regulatory containment or comprehensive outbound trade prohibitions by Chinese authorities.