4-Pyridoxic Acid Lactone from Mexico
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 — Mexico → United States
0%
Rate breakdown
9903.05.860%Universal product exemption (U.S. note 52(b))
Import Tips
• Specify analytical/research end use in documentation; ensure DEA exemption if controlled precursor concerns arise; verify against chapter exclusions