Thiazole-4-Carboxylic Acid from Canada
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 — Canada → United States
6.5%
Rate breakdown
9903.03.030%Articles the product of any country, as provided for in subdivision (aa)(ii) of U.S. note 2 to this subchapter
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)