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
0%
Rate breakdown
9903.05.860%Universal product exemption (U.S. note 52(b))
Import Tips
• Provide synthetic pathway documentation; label as research chemical if not USP; monitor for caffeine impurity thresholds under FDA DSHEA rules