Thiazole-4-Carboxylic Acid
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.
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Alternative Classifications
This product could be classified differently depending on its characteristics or intended use.
If thioether sulfur functionality emphasized over carboxylic/thiazole
Organo-sulfur classification possible if sulfur-carbon bonds dominate structure.
If purely as aromatic carboxylic acid without heterocyclic notation
Chapter notes classify heterocyclic carboxylic acids with heterocycle heading.
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Import Tips & Compliance
• 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)
Related Products under HTS 2934.10.20.00
2-Aminothiazole
2-Aminothiazole is an aromatic heterocyclic compound containing an unfused thiazole ring with an amino group at the 2-position. It falls under HTS 2934.10.20.00 as an aromatic thiazole derivative used primarily as a pharmaceutical intermediate. This chemically defined organic compound meets Chapter 29 requirements for separate classification.
4-Methylthiazole
4-Methylthiazole is a simple aromatic thiazole ring with a methyl substituent at the 4-position, used in flavor synthesis and pharmaceuticals. Classified under HTS 2934.10.20.00 as 'other' aromatic unfused thiazole compounds. Meets Chapter 29 criteria for chemically defined heterocycles.
Thiamine Hydrochloride (Vitamin B1)
Thiamine hydrochloride contains a substituted pyrimidine-thiazolium structure with an unfused aromatic thiazole ring, classified as a vitamin but tariffed as its heterocyclic component. Falls under HTS 2934.10.20.00 as 'other' aromatic thiazole compound per Chapter 29 precedence. The thiazole ring determines classification over vitamin function.
2-Mercaptothiazoline
2-Mercaptothiazoline (2-thiazoline-2-thiol) features a hydrogenated thiazole ring (thiazoline) with aromatic character through conjugation, used in rubber vulcanization. HTS 2934.10.20.00 covers 'whether or not hydrogenated' aromatic/modified aromatic thiazoles. Chemically defined per Chapter 29 note (a).
Ritodrine Hydrochloride
Ritodrine hydrochloride is a beta-adrenergic agonist containing a phenethylamine linked to a modified aromatic thiazole ring, used as tocolytic agent. The unfused thiazole determines HTS 2934.10.20.00 classification as 'other' aromatic thiazole. Pharmaceutical intermediates with heterocyclic principal structure.
Famotidine
Famotidine, an H2-receptor antagonist, contains a thiazole ring linked to guanidine and imidazole moieties in its aromatic heterocyclic structure. Classified under HTS 2934.10.20.00 as the principal thiazole component per numerical order rule. Used in ulcer treatment pharmaceuticals.