High-Purity Research Oxygen-18 Isotope
Enriched oxygen-18 stable isotope gas (>97% purity) for PET imaging tracers and metabolic research. Still classified under HTS 2804.40.00.00 as oxygen, since stable isotopes of nonmetals remain in Chapter 28 unless radioactive.
Import Duty Rates by Country of Origin
Alternative Classifications
This product could be classified differently depending on its characteristics or intended use.
If radioactive oxygen isotopes
Radioactive isotopes specifically classified in 2844 regardless of element.
If mixed heavy water isotopes
Isotopes of hydrogen or deuterium compounds go to 2845.
If prepared as diagnostic reagent kit
Reagents certified for medical diagnostics shift to Chapter 38.
Not sure which classification is right?
The Tariff Assistant works through the GRI rules on your specific product to reach the right HTS code — and can price the duty on it in the same conversation.
Import Tips & Compliance
• Include enrichment ratio certificates from supplier
• Comply with stable isotope import regs under NRC if research-bound
• Avoid misdeclaration as radioactive material
Related Products under HTS 2804.40.00.00
Medical Grade Oxygen USP
High-purity oxygen meeting United States Pharmacopeia (USP) standards for medical applications such as respiratory therapy and anesthesia. Classified under HTS 2804.40.00.00 as elemental oxygen, a nonmetal gas, in its chemically pure form without additives.
Industrial Compressed Oxygen Gas
Pure oxygen gas compressed to high pressure for use in welding, cutting, and metal fabrication processes. Falls under HTS 2804.40.00.00 as chemically defined elemental oxygen, distinct from mixtures or compounds.
Aviation Breathing Oxygen
Oxygen conforming to military specifications (e.g., MIL-PRF-27210) for use in aircraft emergency oxygen systems and pilot breathing masks. Classified in HTS 2804.40.00.00 as pure oxygen gas, not as an aircraft part.
Liquid Oxygen LOX
Cryogenically liquefied oxygen at -183°C used for rocket propulsion, medical cryotherapy, and industrial freezing. Remains under HTS 2804.40.00.00 as the elemental nonmetal oxygen regardless of physical state.
Welding Oxygen CGA 346 Cylinder
Standard welding-grade oxygen filled in CGA 346 valve cylinders for oxy-acetylene and oxy-fuel applications. Classified as pure oxygen under HTS 2804.40.00.00; cylinder is packaging.
Hyperbaric Oxygen Therapy Gas
Ultra-pure oxygen (>99.99%) for hyperbaric chambers treating decompression sickness and wound healing. HTS 2804.40.00.00 applies to the elemental oxygen gas itself.