Ethyl 3-methyl-1H-pyrazole-5-carboxylate from Canada
This ester of a pyrazole carboxylic acid features an unfused aromatic pyrazole ring, classified specifically under HTS 2933.19.37.00 per additional U.S. note 3 to section VI. The ester follows the acid's classification per chapter notes, used primarily as a pharmaceutical intermediate.
Duty Rate — Canada → United States
16.5%
Rate breakdown
9903.05.2910%Section 301 (forced labor) — additional 10% ad valorem on products of Canada
Import Tips
• Chapter note requires esters to follow the parent acid's heading; include structural formula in entry docs
• Test for ester hydrolysis stability during transport to prevent reclassification as free acid
• Declare exact purity level as impurities may affect 'chemically defined' status