Other
Radioactive chemical elements and radioactive isotopes (including the fissile or fertile chemical elements and isotopes) and their compounds; mixtures and residues containing these products: > Uranium depleted in U235 and its compounds; thorium and its compounds; alloys, dispersions (including cermets), ceramic products and mixtures containing uranium depleted in U235, thorium, or compounds of these products: > Other
Duty Rate (from China)
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 2844.30.50
Depleted Uranium Dioxide Powder
Powdered UO2 derived from uranium depleted in U235, used in nuclear fuel fabrication and radiation shielding. It falls under HTS 2844.30.50 as a compound of uranium depleted in U235, distinct from enriched uranium or other isotopes. This chemically defined inorganic compound meets Chapter 28 criteria for classification here.
Thorium Nitrate Powder
Th(NO3)4 anhydrous powder used in thorium-based nuclear fuels and high-temperature ceramics. Classified in HTS 2844.30.50 as a compound of thorium, an alpha-emitting radioactive element per heading 2844 scope. Excludes organo-inorganic compounds covered elsewhere.
Depleted Uranium Metal Ingots
Cast ingots of depleted uranium (DU) metal (<0.711% U235) for armor-penetrating projectiles and shielding. HTS 2844.30.50 covers elemental forms of depleted uranium as 'compounds' broadly includes pure metal per heading scope. Used in military and counterweight applications.
Thorium Oxide Ceramic Pellets
Sintered ThO2 pellets for mixed oxide (MOX) fuel or gas mantle production. As ceramic products containing thorium compounds with >74 Bq/g activity, classified under HTS 2844.30.50 per note 4(d). Excludes optical elements or luminophores.
Depleted Uranium Alloy Shielding Blocks
DU-titanium alloy blocks (e.g., 0.75% Ti) for gamma radiation shielding in medical containers. HTS 2844.30.50 includes alloys containing depleted uranium per heading text and note 4(d). Density >18 g/cm³ enables superior shielding.
Thorium Metal Powder
Pyrophoric thorium powder (99.9% Th-232) for research and alloying applications. Elemental thorium qualifies under HTS 2844.30.50 as covered by 'thorium and its compounds' in heading 2844.30. Stored under inert atmosphere.
Depleted Uranium Trioxide (UO3)
Orange UO3 powder from uranium reprocessing, intermediate for fuel fabrication. Chemically defined compound of depleted uranium per subheading note, HTS 2844.30.50. Hygroscopic, converts to U3O8 upon heating.
Thorium Tetrafluoride Crystals
ThF4 single crystals grown by Czochralski method for optical research. As <2.5g cultured crystals of radioactive compounds, HTS 2844.30.50 applies per Chapter note exclusions. Used in fluoride glass studies.
Depleted Uranium Silicide Fuel Plates
U3Si2 dispersion plates for research reactors, offering higher uranium density than UO2. Ceramic dispersion containing depleted uranium compounds qualifies under HTS 2844.30.50 note 4(d). Cladded in zirconium alloy.
Thorium Hydroxide Precipitate
Th(OH)4 gelatinous precipitate from thorium nitrate digestion, purified for mantle production. As chemically defined thorium compound, HTS 2844.30.50 applies. Washed and calcined to ThO2.
Depleted Uranium Tungsten Alloy Counterweights
DU-W heavy alloy (DU 90%wt) machined counterweights for aircraft elevators. High density (18.5 g/cm³) with controlled radioactivity qualifies under HTS 2844.30.50 as uranium-containing alloy. Liquid phase sintered.
Thorium-232 Isotope Standard
Certified Th-232 spike solution (10 mg/L in 2% HNO3) for mass spectrometry calibration. As artificial radioactive isotope mixture, HTS 2844.30.50 covers per note 4(b). NIST-traceable for alpha spectrometry.
Depleted Uranium Phosphate Glasses
Borosilicate glasses doped with DU for radiation shielding windows. As dispersions containing uranium compounds >74 Bq/g, HTS 2844.30.50 applies per note 4(d). Transmission >90% up to 1 MeV.
Thorium Sulfate Solution
1M Th(SO4)2 aqueous solution for electrodeposition and fuel cycle studies. Liquid compound of thorium qualifies under HTS 2844.30.50 as chemically defined per Chapter 28 note 1. Stabilized with H2SO4.
Mixed Uranium-Thorium Oxide Powder (DU-ThO2)
(U0.3Th0.7)O2 powder for inert matrix fuel research, blending depleted UO2 with ThO2. As mixture containing both depleted uranium and thorium compounds >74 Bq/g, HTS 2844.30.50 covers per note 4(d). Ball-milled homogeneous.