DL-Pantolactone from Mexico
DL-Pantolactone, the cyclic internal ester (lactone) of pantothenic acid, serves as a provitamin B5 intermediate that hydrolyzes to pantothenic acid. Covered under HTS 2936.24.0100 as a pantothenic acid derivative used primarily in vitamin synthesis.
Duty Rate — Mexico → United States
100%
Rate breakdown
9903.04.60100%Except as provided in heading 9903.04.61, patented pharmaceutical articles as provided for in subdivisions (c) and (d) of U.S. note 40 to this subchapter
9903.05.860%Articles provided for in subdivision (b) of U.S. note 52 to this subchapter
Import Tips
• Document lactone hydrolysis to pantothenic acid confirming provitamin status
• Monitor shelf-life stability data for transport classification under Chapter Note 1(f)
• Ensure ≥95% purity to avoid mixture reclassification