Americium-241, californium-252, cesium-137, gadolinium-153, idium-192, promethium-147, radium-226, selenium-75, or ytterbium-169
Radioactive chemical elements and radioactive isotopes (including the fissile or fertile chemical elements and isotopes) and their compounds; mixtures and residues containing these products: > Radioactive elements and isotopes and compounds other than those of subheading 2844.10, 2844.20 or 2844.30; alloys, dispersions (including cermets), ceramic products and mixtures containing these elements, isotopes or compounds; radioactive residues: > Other radioactive elements and isotopes and compounds; other alloys, dispersions (including cermets), ceramic products and mixtures containing these elements, isotopes or compounds > Other elements, isotopes and compounds: > Americium-241, californium-252, cesium-137, gadolinium-153, idium-192, promethium-147, radium-226, selenium-75, or ytterbium-169
Duty Rate (from China)
Effective with respect to entries on or after September 27, 2024, articles the product of China, as provided for in subdivision (b) of U.S. note 31 to this subchapter
Articles the product of any country, as provided for in subdivision (aa)(ii) of U.S. note 2 to this subchapter
Products classified under HTS 2844.43.00.21
Americium-241 Oxide
Americium-241 oxide is a radioactive compound used primarily in smoke detectors and as a calibration source for gamma spectroscopy. It falls under HTS 2844.43.00.21 as a chemically defined compound of the specified radioactive isotope Americium-241. This subheading covers specific listed radioactive elements, isotopes, and their compounds.
Californium-252 Neutron Source
Californium-252 sealed sources emit neutrons for industrial applications like moisture gauging and reactor startup. Classified under HTS 2844.43.00.21 as it contains the specifically listed isotope californium-252. These are chemically defined radioactive isotopes per Chapter 28 notes.
Cesium-137 Sealed Source
Cesium-137 sealed irradiators used for blood irradiation and calibration standards in nuclear medicine. Falls under HTS 2844.43.00.21 as a compound of the listed radioactive isotope cesium-137. Meets Chapter 28 definition for radioactive isotopes and their compounds.
Gadolinium-153 Calibration Source
Gadolinium-153 sources for calibrating bone density scanners and PET/SPECT systems. Classified in HTS 2844.43.00.21 as it contains the named isotope gadolinium-153 in oxide form. Chapter notes confirm radioactive isotopes coverage.
Iridium-192 Industrial Radiography Source
Iridium-192 wire sources for non-destructive weld testing in pipeline and aerospace manufacturing. HTS 2844.43.00.21 applies to this listed metallic isotope used in sealed capsules. Qualifies as chemically defined radioactive element per subheading note.
Promethium-147 Beta Source
Promethium-147 used in thickness gauges for paper/plastic film manufacturing. Falls under HTS 2844.43.00.21 as chemically defined compound of listed rare earth isotope. Chapter 28 note 4 explicitly covers promethium.
Radium-226 Calibration Standard
Radium-226 reference sources for alpha spectrometry calibration in environmental labs. Classified HTS 2844.43.00.21 as listed naturally occurring radioactive isotope. Maintains Chapter 28 classification despite alpha decay products.
Selenium-75 Gamma Source
Selenium-75 well logging sources for oilfield gamma ray measurements. HTS 2844.43.00.21 covers this specific gamma-emitting isotope used in sealed form. Chemically defined per Chapter 28 subheading note.
Ytterbium-169 Industrial Source
Ytterbium-169 brachytherapy and industrial radiography sources with low-energy gammas. Classified under HTS 2844.43.00.21 as listed rare earth radioisotope. Chapter note confirms lanthanide isotope coverage.