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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%Section 301 (forced labor) — additional 12.5% ad valorem on products of China

Import Tips

Drug Master File documentation essential; CAS registry verification; ensure not classified as finished API