4-Pyridoxic Acid Lactone from Canada
4-Pyridoxic Acid Lactone serves as a stable vitamin B6 metabolite and derivative with biological activity. Falls under HTS 2936.25.00.00 as a related compound used primarily as vitamin B6 in research and analysis. Used as internal standard in vitamin assays.
Duty Rate — Canada → United States
0%
Rate breakdown
9903.03.030%Articles the product of any country, as provided for in subdivision (aa)(ii) of U.S. note 2 to this subchapter
Import Tips
• Specify analytical/research end use in documentation; ensure DEA exemption if controlled precursor concerns arise; verify against chapter exclusions