Theophylline Monohydrate from China
Theophylline monohydrate is a methylxanthine with pyrimidine rings, used in respiratory medications. Classified in HTS 2933.59.70.00 as an aromatic compound per additional U.S. note 3 to section VI. The hydrate form remains a separate chemically defined organic compound.
Duty Rate — China → United States
19%
Rate breakdown
9903.05.3112.5%Section 301 (forced labor) — additional 12.5% ad valorem on products of China
Import Tips
• Document water content precisely (monohydrate ~8-9%) to distinguish from anhydrous form
• Comply with DEA precursor chemical reporting if applicable for pharma synthesis
• Provide GMP manufacturing certificates for API-grade imports