7-Dehydrocholesterol (Provitamin D3) from China
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 — China → United States
0%
Rate breakdown
9903.05.860%Universal product exemption (U.S. note 52(b))
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