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.
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Alternative Classifications
This product could be classified differently depending on its characteristics or intended use.
If installed in complete oilfield logging tools
Finished downhole logging equipment classifies under oil/gas machinery Chapter 84.
If other transuranic elements
Transuranics in 2844.42; Se-75 as lighter element specifically in 2844.43.
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Import Tips & Compliance
• Oilfield sources need API Spec 5DP certification for downhole encapsulation
• Coordinate with DOT PHMSA for highway transport exemption under 49 CFR 173.427
• Declare as 'not for medical use' to avoid FDA radiation safety oversight
Related Products 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.