Theophylline USP Grade from China
Theophylline is a methylxanthine bronchodilator drug with a fused imidazole-pyrimidine heterocyclic structure, falling under HTS 2933.99.90.00. Used primarily in respiratory medications, it qualifies as a 'drug' per tariff specifications.
Duty Rate — China → United States
16.2%
Rate breakdown
9903.05.3112.5%Section 301 (forced labor) — additional 12.5% ad valorem on products of China
Import Tips
• Provide USP certificate and DMF for FDA import clearance
• Label as 'Rx only' to avoid OTC misclassification issues
• Monitor DEA precursor status for diversion control