</>Build with Tariff Intelligence|Programmatic access to tariff calculations and HS code classification.Explore Developer Resources →
2939.59.00.00/Paraxanthine Pharmaceutical Intermediate/China

Paraxanthine Pharmaceutical Intermediate from China

Paraxanthine is a primary caffeine metabolite and theophylline-related dimethylxanthine used in nootropic supplements. Classified in HTS 2939.59.00.00 as 'other' xanthine alkaloid derivatives. Synthetic production for research and cognitive enhancement products.

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
Calculate with your customs valueVerify classification with AI

Import Tips

• Provide synthetic pathway documentation; label as research chemical if not USP; monitor for caffeine impurity thresholds under FDA DSHEA rules

Paraxanthine Pharmaceutical Intermediate from China — Import Duty Rate | HTS 2939.59.00.00