Thiazole-4-Carboxylic Acid from China
Thiazole-4-carboxylic acid features an aromatic thiazole ring with carboxylic acid at position 4, used in pharmaceutical synthesis. HTS 2934.10.20.00 as 'other' aromatic thiazole per rule that acid-function compounds classified by heterocyclic parent. Chapter 29 numerical precedence applies.
Duty Rate — China → United States
44%
Rate breakdown
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)
9903.05.3112.5%Section 301 (forced labor) — additional 12.5% ad valorem on products of China
Import Tips
• Titration analysis confirming carboxylic acid content on COA
• Specify 'heterocyclic acid' nomenclature on entry documents
• Avoid sodium salt form which follows acid classification per Chapter note 3(C)