Acetazolamide from China
Acetazolamide is a carbonic anhydrase inhibitor used primarily as a diuretic and for glaucoma treatment, featuring an acyclic amide structure with a sulfonamide group. It falls under HTS 2924.19.80.00 as an acyclic amide derivative not specifically covered by other subheadings in 2924.19. This classification aligns with chapter notes for chemically defined organic compounds with amide functions.
Duty Rate — China → United States
44%
Rate breakdown
9903.88.0325%Except as provided in headings 9903.88.13, 9903.88.18, 9903.88.33, 9903.88.34, 9903.88.35, 9903.88.36, 9903.88.37, 9903.88.38, 9903.88.40, 9903.88.41, 9903.88.43, 9903.88.45, 9903.88.46, 9903.88.48, 9903.88.56, 9903.88.64, 9903.88.66, 9903.88.67, 9903.88.68, or 9903.88.69, articles the product of China, as provided for in U.S. note 20(e) to this subchapter and as provided for in the subheadings enumerated in U.S. note 20(f)
9903.05.3112.5%Section 301 (forced labor) — additional 12.5% ad valorem on products of China
Import Tips
• Verify pharmaceutical-grade purity certificates and comply with FDA import requirements for drug substances
• Include chemical analysis reports confirming acyclic amide structure to avoid reclassification
• Avoid common pitfalls like improper labeling of salts, which must follow the parent amide classification per chapter notes