High-Purity Research Oxygen-18 Isotope from Canada
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.
Duty Rate — Canada → United States
13.7%
Rate breakdown
9903.05.2910%Section 301 (forced labor) — additional 10% ad valorem on products of Canada
Import Tips
• Include enrichment ratio certificates from supplier
• Comply with stable isotope import regs under NRC if research-bound
• Avoid misdeclaration as radioactive material