7-Dehydrocholesterol (Provitamin D3) from Mexico
7-Dehydrocholesterol is the natural provitamin D3 found in animal skin, which upon UVB exposure converts to cholecalciferol (vitamin D3). This synthetic or concentrated form is imported under HTS 2936.90.0110 as a provitamin for pharmaceutical and supplement production. It qualifies as a separate chemically defined organic compound per Chapter 29 notes.
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
• Include UV absorption spectra verifying provitamin structure; animal-derived forms need BSE/TSE certification
• Document solvent use per Chapter 29 note (e) if dissolved; stabilizer additions must be for transport only
• Avoid 'vitamin D3' labeling to prevent premature classification; specify photo-conversion required