Pyrazole Pharmaceutical Intermediate from China
Pyrazole consists of a five-membered ring with two adjacent nitrogen atoms, classified as an aromatic nitrogen heterocycle under HTS 2933.99.82. Used extensively as a scaffold in drug discovery for anti-inflammatory and antiviral agents.
Duty Rate — China → United States
19%
Rate breakdown
9903.05.3112.5%Except for products described in headings 9903.05.85–9903.05.92, articles the product of China, as provided for in U.S. note 52 to this subchapter
Import Tips
• Drug Master File documentation essential; CAS registry verification; ensure not classified as finished API