</>Build with Tariff Intelligence|Programmatic access to tariff calculations and HS code classification.Explore Developer Resources →
2933.59.53.00/Theophylline Anhydrous API/Mexico

Theophylline Anhydrous API from Mexico

Theophylline is a methylxanthine drug with fused pyrimidine-imidazole rings, used for respiratory disorders. Classified in HTS 2933.59.53.00 due to its aromatic pyrimidine structure and status as a pharmaceutical drug. Meets Chapter 29 criteria for separate chemically defined compounds.

Duty Rate — Mexico → United States

16.5%

Rate breakdown

9903.05.5510%Section 301 (forced labor) — additional 10% ad valorem on products of Mexico
Calculate with your customs valueVerify classification with AI

Import Tips

• Register with FDA as bulk drug substance; include pharmacopeial grade certification

• Verify no solvents beyond transport allowances per Chapter 29 note (e)

Theophylline Anhydrous API from Mexico — Import Duty Rate | HTS 2933.59.53.00