Biligrafin Acid from China
Biligrafin acid is a specific aromatic cyclic amide derivative used primarily as a contrast agent in medical imaging procedures like cholangiography. It falls under HTS 2924.29.0500 as it is explicitly named in the tariff description for carboxyamide-function compounds that are aromatic cyclic amides. This chemically defined organic compound is imported in pure form for pharmaceutical manufacturing.
Duty Rate — China → United States
17.8%
Rate breakdown
9903.05.3112.5%Section 301 (forced labor) — additional 12.5% ad valorem on products of China
Import Tips
• Verify purity certificates and provide chemical safety data sheets (SDS) for customs clearance; ensure FDA compliance for pharmaceutical precursors
• Common pitfall: incorrect labeling as a finished drug instead of bulk chemical