Germanium Tetrachloride: Uses, Supply and 2026 Outlook

Germanium tetrachloride (GeCl₄, CAS 10038-98-9) is a colorless, corrosive liquid used mainly to make the glass core of optical fiber. It is also an intermediate in refining high-purity germanium. Supply has tightened sharply since 2023 because China, the leading producer of germanium, restricted exports. This article explains what germanium tetrachloride is used for, what is happening to supply, and what buyers should plan for.

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What Is Germanium Tetrachloride?

Germanium tetrachloride (IUPAC name: tetrachlorogermane) has a molecular weight of 214.4 g/mol. Under the Globally Harmonized System (GHS), it is classified as causing severe skin burns and eye damage (H314), and many suppliers' notifications also list it as fatal if inhaled (H330). It must be handled in closed systems with appropriate protective equipment.

The US Geological Survey (USGS) reports that germanium is recovered mainly from certain zinc and lead-zinc-copper ores and lignite coal deposits. It is processed into germanium dioxide and germanium tetrachloride, and germanium is also recovered by recycling, including from wastes generated during optical fiber manufacturing.

What Is Germanium Tetrachloride Used For?

Optical Fiber

According to the USGS, fiber optics is the largest end use of germanium in the United States. Germanium dioxide and germanium tetrachloride are consumed in making the fiber optic glass used for data networking and telecommunications. The USGS notes that a company in Quapaw, Oklahoma produces germanium tetrachloride for fiber optics from imported and recycled germanium.

Other Germanium End Uses

The USGS lists the other major US end uses of germanium, in descending order, as infrared optics, semiconductor applications and solar cells, and radiation detectors. Germanium compounds are also used to make germane gas for certain semiconductor and solar cell manufacturing. Related materials include Germanium Oxide.

Germanium Supply in 2026: What Buyers Need to Know

• China leads production. The USGS reports that China continued to be the leading global producer and exporter of germanium metal in 2025.
• Export controls since 2023. China introduced an export licensing program for germanium in August 2023, then banned germanium exports to the United States in December 2024 (USGS).
• US imports fell. US imports of germanium metal were estimated to have dropped 67% in 2025 from 2024, to about 7,000 kilograms, which the USGS attributes to China's ban.
• Prices rose. Between January and October 2025, European prices for germanium metal (99.999% minimum purity) rose from $3,150 to $5,380 per kilogram, and germanium dioxide from $2,200 to $2,850 per kilogram (USGS, citing Argus Media).
• A temporary pause on the US ban. In November 2025, China's commerce ministry suspended the US-specific export ban until November 27, 2026. Exports still require a Chinese export license, and the earlier dual-use export controls remain in place (Fastmarkets).
• US investment. In August 2025 the US Department of Energy announced initiatives totaling $1 billion to strengthen domestic critical-mineral supply chains, including refining germanium for semiconductors (USGS).

Because the pause expires on November 27, 2026, buyers relying on Chinese-origin material should confirm the current status with their supplier before placing orders.

How to Plan Germanium Tetrachloride Purchases

1. Confirm the country of origin and whether export licenses apply to your shipment.
2. Specify purity and impurity limits for your process. Fiber and electronic applications are sensitive to trace contaminants, so put your limits in writing and require a lot-specific certificate of analysis (COA).
3. Confirm packaging and transport suited to a corrosive, moisture-sensitive liquid, along with the safety data sheet and shipping classification.
4. Check the tariff line. The USGS lists germanium tetrachloride under HTS 2827.39.9050 (unspecified chlorides) at a 3.7% normal trade relations duty as of December 31, 2025.
5. Consider recycled and non-Chinese sources. The USGS lists the United States, Belgium, Canada, Germany and Russia among countries that process or recycle germanium, alongside China.
6. Build buffer stock or contract volumes if your production depends on steady supply.

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Frequently Asked Questions

What Is the CAS Number for Germanium Tetrachloride?

The CAS number is 10038-98-9; the chemical formula is GeCl₄.

What Is Germanium Tetrachloride Used For?

Mainly in making optical fiber glass, where it is consumed alongside germanium dioxide, and as an intermediate in producing high-purity germanium.

Is Germanium Tetrachloride Hazardous?

Yes. It is classified as corrosive to skin and eyes (H314), and many notifications list it as fatal if inhaled (H330). Always follow the supplier's safety data sheet.

Can the US Import Germanium From China in 2026?

China suspended its US-specific export ban until November 27, 2026, but exports still need a Chinese export license. Check the latest status before ordering.

Where Can I Buy Germanium Tetrachloride?

Parchem supplies Germanium Tetrachloride to industrial and research buyers. Request a quote to check availability.

Source Germanium Compounds With Parchem

Parchem supplies Germanium Tetrachloride, Germanium Oxide and other specialty materials, with documentation and logistics support for hazardous shipments. Request a quote or see our logistics services.

Sources

• US Geological Survey, Mineral Commodity Summaries 2026: Germanium.
• PubChem, Germanium tetrachloride (CID 66226): identity, molecular weight and GHS classification.
• Fastmarkets, China suspends export prohibition on gallium, germanium, antimony, superhard materials to US (November 2025).