Synthetic Papaverine Hydrochloride from China
Synthetic papaverine hydrochloride replicates the opium-derived alkaloid structure through total chemical synthesis, used identically in pharmaceuticals. Covered under HTS 2939.19.10.00 as 'alkaloids, natural or reproduced by synthesis, and their salts' per heading language. This enables import of non-plant-extracted material meeting identical purity specs.
Duty Rate — China → 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 synthesis route documentation proving structural identity to natural papaverine; chiral purity confirmation essential
• Synthetic versions need identical impurity profile to natural; declare 'reproduced by synthesis' explicitly on commercial invoice
• Monitor for residual synthesis solvents (<500ppm); chapter note (e) permits transport solvents but not persistent impurities