Chapter 2845 — Customs Tariff Headings

Deuterated Water D2O for Mass Spectrometry 99.9% Purity

Deuterated water (D2O) at 99.9% purity, used as a solvent and internal standard in mass spectrometry and isotopic labeling studies. It is an inorganic compound of the stable isotope deuterium, falling under tariff item 2845.10.00 as heavy water.

Deuterium Oxide D2O Laboratory Grade 99.8% Isotopic Purity

Laboratory-grade heavy water (D2O) at 99.8% isotopic purity, used in NMR spectroscopy and chemical research. It is a stable isotope compound, distinct from radioactive isotopes, and classified under tariff item 2845.10.00 as heavy water.

Heavy Water (Deuterium Oxide) D2O 99.9% Purity

Heavy water (deuterium oxide, D2O) at 99.9% purity, enriched with deuterium isotopes and used in nuclear and research applications. It is classified under tariff item 2845.10.00 as an isotope compound other than those in heading 28.44.

High-Purity Heavy Water for Nuclear Moderation D2O 99.96%

Ultra-high purity deuterium oxide (99.96% D2O) designed for use as a moderator and coolant in heavy water nuclear reactors. It is a stable heavy water isotope, excluding radioactive isotopes, and falls under tariff item 2845.10.00.

Industrial Heavy Water D2O 99.5% for Chemical Synthesis

Industrial-grade heavy water (D2O 99.5%) used in organic synthesis and deuterium exchange reactions in pharmaceutical production. It is classified as deuterium oxide under tariff item 2845.10.00 per chapter isotope provisions.

Research-Grade Deuterium Oxide D2O 99.95% for NMR Solvents

Research-grade D2O at 99.95% purity, used as a lock solvent in nuclear magnetic resonance (NMR) spectroscopy. It is heavy water, a chemically defined isotope compound, and falls under tariff item 2845.10.00.

Boron-10 Enriched Boric Acid

Boric acid where the boron isotope is enriched in boron-10, typically to over 90% isotopic purity. Used in nuclear reactor control rods and neutron detection systems, this compound falls under tariff item 2845.20.00 as a compound of isotopically enriched boron.

Boron-10 Enriched Boron Nitride Powder

Boron nitride powder with high boron-10 content, used in high-temperature ceramics and neutron detectors. This inorganic compound of isotopically enriched boron is classified under tariff item 2845.20.00, distinct from standard boron nitride by its isotopic composition.

Boron-10 Enriched Boron Oxide Powder

Boron oxide powder enriched in the boron-10 isotope, used in specialized glass manufacturing and neutron shielding. As a compound of isotopically enriched boron, it is classified under tariff item 2845.20.00 per Chapter 28 notes.

Decaborane-10 (B10H14) Isotopically Enriched

Decaborane enriched with boron-10, a volatile boron hydride used in rocket propellants and boron neutron capture therapy precursors. This organic compound of boron-10 enriched isotope qualifies for tariff item 2845.20.00 under Chapter 28 provisions.

Sodium Borohydride-10 Enriched

Sodium borohydride with boron-10 enrichment, a reducing agent for specialized chemical synthesis and neutron-sensitive applications. It falls under tariff item 2845.20.00 as a compound of enriched boron isotope, meeting Chapter 28 criteria for chemically defined compounds.

Trimethyl Borate-10 Enriched

Trimethyl borate liquid with boron-10 enrichment, a reagent in organic synthesis and isotopic labeling studies. Under tariff item 2845.20.00 as an organic compound of enriched boron, per Chapter 28 and 29 note cross-references.

Lithium-6 Enriched Lithium Borohydride

Lithium-6 enriched lithium borohydride is a complex salt (LiBH4) where the lithium is isotopically enriched in lithium-6. It is used for lightweight hydrogen storage in fusion prototypes. As a chemically defined inorganic compound of an enriched lithium isotope, it falls under tariff item 2845.30.00.

Lithium-6 Enriched Lithium Carbonate Powder

Lithium-6 enriched lithium carbonate is a fine powder of Li2CO3 with the lithium isotopically enriched in lithium-6. It is used in neutron shielding and as a fusion fuel precursor. As a chemically defined inorganic compound of an enriched lithium isotope, it is classified under tariff item 2845.30.00.

Lithium-6 Enriched Lithium Chloride Crystals

Lithium-6 enriched lithium chloride consists of anhydrous LiCl crystals with more than 90% lithium-6 enrichment. It is used in molten salt reactors and isotope separation processes. As a chemically defined inorganic compound of an enriched lithium isotope, it falls under tariff item 2845.30.00.

Lithium-6 Enriched Lithium Fluoride Single Crystals

Lithium-6 enriched lithium fluoride single crystals are synthetic crystals of LiF enriched in lithium-6. They are used in neutron detectors and laser optics in nuclear facilities. As chemically defined inorganic compounds of an enriched lithium isotope, they are classified under tariff item 2845.30.00.

Lithium-6 Enriched Lithium Hydride Powder

Lithium-6 enriched lithium hydride is a powder of LiH with the lithium isotopically enriched in lithium-6. It is used for hydrogen storage and as a neutron moderator in reactors. As a chemically defined inorganic compound of an enriched lithium isotope, it falls under tariff item 2845.30.00.

Lithium-6 Enriched Lithium Hydroxide

Lithium-6 enriched lithium hydroxide is a compound of LiOH with the lithium isotopically enriched in lithium-6. It is used in advanced battery research and thermonuclear applications. As a chemically defined inorganic compound of an enriched lithium isotope, it is classified under tariff item 2845.30.00.

Lithium-6 Enriched Lithium Metal

Lithium-6 enriched lithium metal is high-purity lithium metal with isotopic enrichment in lithium-6, supplied as ingots or rods. It is used for nuclear applications. As lithium enriched in lithium-6, it falls under tariff item 2845.30.00.

Lithium-6 Enriched Lithium Nitrate Solution

Lithium-6 enriched lithium nitrate solution is an aqueous solution of LiNO3 with lithium-6 enrichment. It is used for radiochemical tracers and reactor coolants. As a chemically defined inorganic compound of an enriched lithium isotope, it falls under tariff item 2845.30.00.

Lithium-6 Enriched Lithium Phosphate

Lithium-6 enriched lithium phosphate is a compound of Li3PO4 with lithium-6 enrichment. It is used for specialized solid-state electrolytes in nuclear batteries. As a chemically defined inorganic compound of an enriched lithium isotope, it is classified under tariff item 2845.30.00.

Lithium-6 Enriched Lithium Sulfate

Lithium-6 enriched lithium sulfate consists of Li2SO4 crystals enriched in lithium-6. It is used for thermal energy storage in nuclear plants. As a chemically defined inorganic compound of an enriched lithium isotope, it falls under tariff item 2845.30.00.

Enriched Helium-3 Isotope

> Enriched Helium-3 is helium gas with an artificially increased concentration of the helium-3 isotope beyond its natural abundance. It is classified under tariff item 2845.40.00 as a non-radioactive isotope of helium, distinct from radioactive isotopes of heading 28.44. The enrichment process modifies the isotopic composition, making it a separate chemically defined isotope.

Helium-3 Cryogenic Fluid

> Helium-3 cryogenic fluid is helium-3 in liquefied form, used in dilution refrigerators to reach millikelvin temperatures. It is the helium-3 isotope itself, meeting the definition of an isotope with modified composition. This product falls under tariff item 2845.40.00 as a non-radioactive isotope.

Helium-3 Gas

> Helium-3 gas is a rare, stable isotope of helium used in cryogenic research and neutron detection. It is a non-radioactive isotope, distinct from those in heading 28.44, and is classified under tariff item 2845.40.00. The gas is supplied in high-pressure cylinders for various applications.

Helium-3/Helium-4 Mixture (Dilution Grade)

> Helium-3/Helium-4 mixture (dilution grade) is a pre-mixed solution with 3-10% helium-3 concentration, used in dilution refrigerator stills. The isotopic content qualifies as enriched helium isotopes under tariff item 2845.40.00. It is used directly in cryostats for phase separation and cooling.

Helium-3 Neutron Detector Fill Gas

> Helium-3 neutron detector fill gas is high-purity helium-3 gas filled into detector tubes for thermal neutron detection. It is classified as the isotope itself under tariff item 2845.40.00, not as a finished detector. The isotope's neutron absorption properties make it essential for security and research applications.

Helium-3 Polarized Gas

> Helium-3 polarized gas is spin-polarized helium-3 used in neutron polarizers and MRI lung imaging research. It is chemically the same isotope and falls under tariff item 2845.40.00 despite the polarization. The product is produced via optical pumping and retains its isotopic identity.

Research Grade Helium-3

> Research grade helium-3 is ultra-pure helium-3 (>99.9%) for university and national lab research in nuclear physics. It is a non-radioactive isotope with enriched composition, classified under tariff item 2845.40.00. Supplied in small high-pressure cylinders for specialized applications.

Argon-38 Enriched Gas

Argon-38 is a stable isotope of argon, enriched for use in geological age dating and tracer studies. It is a separate chemical element that is not radioactive, so it does not fall under heading 28.44. This tariff item covers isotopes other than those of heading 28.44 and their compounds.

Carbon-14 Labeled Urea

Carbon-14 labeled urea is an organic compound of the radioactive isotope carbon-14, used in biochemical tracer studies and radiometric dating. Although carbon-14 is radioactive, it is not one of the specific elements listed in heading 28.44 (technetium, promethium, polonium, or elements with atomic number greater than 84). Therefore, it falls under this tariff item for isotopes other than those of heading 28.44.

Deuterium Oxide (Heavy Water, D2O)

Deuterium oxide, also known as heavy water, is a compound of the stable hydrogen isotope deuterium. It is used as a moderator in nuclear reactors and in various scientific applications. Since deuterium is not a radioactive isotope, it is excluded from heading 28.44 and falls under this tariff item for compounds of isotopes other than those of heading 28.44.

Helium-3 Gas

Helium-3 is a rare stable isotope of helium, used in cryogenics, neutron detection, and quantum computing. It is not a radioactive isotope, so it is not classified in heading 28.44. This tariff item covers isotopes other than those of heading 28.44, including helium-3.

Krypton-86 Gas Standard

Krypton-86 is a stable isotope of krypton, used as a wavelength standard in laser metrology and spectroscopy. It is not radioactive and therefore not classified under heading 28.44. This tariff item covers isotopes other than those of heading 28.44.

Lead-208 Enriched Target

Lead-208 enriched target is a stable isotope of lead, used in nuclear physics experiments and isotope production. It is not radioactive and does not fall under heading 28.44. This tariff item covers isotopes other than those of heading 28.44.

Magnesium-25 Carbonate

Magnesium-25 carbonate is a compound of the stable isotope magnesium-25, used in nutrition studies and isotope dilution analysis. It is not radioactive and therefore not classified under heading 28.44. This tariff item covers compounds of isotopes other than those of heading 28.44.

Neon-22 Isotope

Neon-22 is a stable isotope of neon, used in mass spectrometry standards and neon sign manufacturing. It is not radioactive and does not fall under heading 28.44. This tariff item covers isotopes other than those of heading 28.44.

Nickel-64 Metal Powder

Nickel-64 is a stable isotope of nickel, used in nuclear target fabrication and catalyst research. It is not radioactive and therefore not classified under heading 28.44. This tariff item covers isotopes other than those of heading 28.44.

Oxygen-18 Water (H2^18O)

Oxygen-18 water is water enriched with the stable isotope oxygen-18, used in PET imaging and metabolic research. It is a compound of a non-radioactive isotope, so it is not classified under heading 28.44. This tariff item covers compounds of isotopes other than those of heading 28.44.

Silicon-29 Wafer Blank

Silicon-29 enriched single crystal wafer blanks are used for quantum computing qubits. They are a form of the stable isotope silicon-29, not radioactive, and therefore not classified under heading 28.44. This tariff item covers isotopes other than those of heading 28.44.

Sulfur-34 Elemental

Sulfur-34 is a stable isotope of sulfur, used in NMR spectroscopy and metabolic studies. It is not radioactive and therefore not classified under heading 28.44. This tariff item covers isotopes other than those of heading 28.44.

Tritium Gas (HT)

Tritium gas (HT) is the radioactive isotope of hydrogen, used in nuclear research, fusion experiments, and as a tracer in scientific studies. It falls under tariff item 2845.90.00 because it is an isotope other than those of heading 28.44, and its compounds, whether inorganic or organic, are classified here.