Cesium Metal Ampoules from Mexico
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.
Duty Rate — Mexico → United States
5.5%
Rate breakdown
9903.05.860%Articles provided for in subdivision (b) of U.S. note 52 to this subchapter
Import Tips
• 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