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

1H-Pyrazole-3-carboxylic Acid from Mexico

1H-Pyrazole-3-carboxylic acid contains both unfused pyrazole ring and carboxylic acid function, classified under HTS 2933.19.90.00 with heterocyclic heading taking precedence. Used in pharmaceutical synthesis and agrochemical production.

Duty Rate — Mexico → United States

16.5%

Rate breakdown

9903.05.5510%Section 301 (forced labor) — additional 10% ad valorem on products of Mexico

Import Tips

pH-sensitive - specify neutral packaging and include corrosion inhibitor if required

Carboxylic acid derivatives need decarboxylation stability data for classification

Confirm free acid vs. salt form - sodium salt may affect duty treatment