Ethyl 3-methyl-1H-pyrazole-5-carboxylate from China
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 — China → United States
41.5%
Rate breakdown
9903.03.0110%Except for products described in headings 9903.03.02–9903.03.11, articles the product of any country, as provided for in subdivision (aa) of U.S. note 2 to this subchapter
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)
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