China is facing increasing scrutiny over exports of indium, a little-known metal that has become increasingly important for artificial intelligence infrastructure and next-generation data centers.
Although indium itself is not currently subject to export controls, buyers say Chinese customs are demanding more documentation and conducting additional checks before approving shipments. The tighter oversight has fueled concerns that Beijing could soon impose formal export restrictions on the strategic metal.
The move comes as China continues to leverage its dominance over critical minerals amid growing technology competition with the United States.
What is indium, and why is it important?
Indium is a rare metal primarily produced as a byproduct of zinc refining.
For decades, it has been widely used in:
- Flat-panel displays.
- Touchscreens.
- Solar panels.
- Electronic solders.
More recently, indium has gained strategic importance because it is used to manufacture indium phosphide (InP), a semiconductor material essential for high-speed optical communication.
These optical chips help move massive volumes of data between servers inside AI data centers, making them increasingly important as demand for artificial intelligence computing continues to grow.
Why are buyers worried?
While indium metal has not officially been added to China’s export control list, importers say obtaining shipments has become noticeably more difficult.
According to industry reports:
- Some European buyers have been asked to provide end-user information for the first time.
- North American importers report that export approvals that once took hours now require several days due to additional paperwork.
- Companies describe the overall environment as increasingly uncertain.
So far, there are no confirmed reports of shipments being blocked, but many fear the additional scrutiny could precede stricter export controls.
How does this relate to AI?
The concern extends beyond indium itself.
In February 2025, China added indium phosphide to its export control list, tightening oversight of materials used to manufacture high-speed optical chips.
These chips are increasingly critical because they:
- Connect GPUs inside AI clusters.
- Enable rapid data transfer between servers.
- Reduce latency in large AI training systems.
- Improve energy efficiency in hyperscale data centers.
Without reliable supplies of indium-related materials, manufacturers could face challenges producing next-generation networking hardware for AI infrastructure.
Why does China dominate the market?
China accounts for roughly 70% of global indium production, giving it significant influence over worldwide supply.
Its dominance stems from:
- Large zinc refining capacity.
- Integrated processing infrastructure.
- Long-established critical mineral supply chains.
This mirrors China’s strong position in several other strategic materials used in batteries, semiconductors, renewable energy, and defense technologies.
Why is the US paying attention?
The United States increasingly views critical minerals as a national security issue.
According to reports, US authorities are considering stockpiling up to 403 metric tons of indium over the next three years to reduce dependence on overseas supplies.
The effort reflects broader initiatives aimed at securing supply chains for semiconductors, artificial intelligence, and advanced manufacturing.
Could export controls become stricter?
There is no official indication that China will immediately place indium metal under export controls.
However, industry observers believe the current customs scrutiny may serve several purposes:
- Improving oversight of sensitive exports.
- Identifying end users.
- Preparing for possible future licensing requirements.
- Strengthening China’s leverage in technology-related trade disputes.
Whether additional restrictions materialize remains uncertain.
The bigger picture
China’s increased scrutiny of indium exports highlights how critical minerals have become central to the global technology race.
As AI systems require ever-larger data centers and faster optical networking, materials that were once considered niche commodities are becoming strategically important. Even without formal export bans, additional customs checks can create uncertainty for manufacturers and reinforce concerns over supply chain resilience.
TL;DR
- China is tightening oversight of indium exports, a metal used in advanced electronics and AI infrastructure.
- China produces nearly 70% of the world’s indium supply.
- Indium is used to produce indium phosphide, a key material for high-speed optical chips powering AI data centers.
- Buyers report longer approval times and increased customs scrutiny.
- The US is reportedly looking to build strategic indium stockpiles amid fears of future supply disruptions.