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Cesium Metal Ampoules

Cesium metal sealed in glass ampoules to prevent reaction with air, used in atomic clocks and photoelectric cells. As a pure alkali metal, it fits HTS 2805.19.90 'other' category excluding solutions or alloys.

Import Duty Rates by Country of Origin

Origin Country	MFN Rate	Ch.99 Surcharges	Total Effective Rate
🇨🇳China	5.5%	+25.0%	30.5%
🇲🇽Mexico	5.5%	—	5.5%
🇨🇦Canada	5.5%	—	5.5%
🇩🇪Germany	5.5%	—	5.5%
🇯🇵Japan	5.5%	—	5.5%

More Specific Codes

This product may fall under a more specific subheading:

Alternative Classifications

This product could be classified differently depending on its characteristics or intended use.

2844.10.10Lower: 30% vs 30.5%

If containing radioactive isotopes

Radioactive isotopes or compounds thereof are exclusively in 2844 per Chapter Note 5.

9027.30Lower: 12.5% vs 30.5%

If incorporated into spectrometers

Instruments using cesium like atomic clocks fall under Chapter 90.

Not sure which classification is right?

The Tariff Assistant works through the GRI rules on your specific product to reach the right HTS code — and can price the duty on it in the same conversation.

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Import Tips & Compliance

• Include vacuum-sealed certification and handling instructions for pyrophoric nature

• Verify no radioactive isotopes present to avoid 2844 classification

• Customs may require end-use statements for dual-use potential

Related Products under HTS 2805.19.90

Sodium Metal Ingots

Pure sodium metal in ingot form, an alkali metal used primarily in industrial applications such as chemical synthesis and alloy production. Classified under HTS 2805.19.90 as it is an alkali metal other than sodium in aqueous solution. This subheading covers rare-earth free, non-interalloyed alkali metals like sodium.

Potassium Metal Chunks

High-purity potassium metal supplied in small chunks under inert atmosphere, used in organic synthesis and as a reducing agent. Falls under HTS 2805.19.90 as an alkali metal, not in solution or interalloyed. Excludes rare-earth metals or mercury per Chapter 28 notes.

Lithium Metal Ribbons

Thin ribbon-form lithium metal, an alkali metal used in battery anodes and pharmaceutical intermediates. HTS 2805.19.90 applies to this pure, unalloyed form excluding aqueous or specific solutions. Distinguished from lithium compounds in other chapters.