4-Methylthiazole from Japan

4-Methylthiazole is a simple alkyl-substituted thiazole used in flavor and fragrance applications and as a pharmaceutical intermediate. Classified under HTS 2934.10.90.00 as an 'other' unfused thiazole ring compound meeting Chapter 29 requirements for chemically defined heterocycles. The methyl substitution does not alter its primary thiazole classification.

Duty Rate — Japan → United States

15%

Rate breakdown

9903.04.628.5%Pharmaceuticals: patented pharma from JP/EU/KR/CH/LI — 15% floor rate

9903.05.900%Articles already subject to Section 232 (steel/aluminum/copper + derivatives, autos + parts, wood, medium/heavy vehicles + parts, semiconductors, patented pharma) — U.S. note 52(f)

Calculate with your customs value Verify classification with AI

Import Tips

• Declare intended use (flavor vs pharmaceutical) on entry documents as this affects potential FDA oversight

• Provide GC-MS analysis verifying structure and isomer purity to distinguish from 2- or 5-methylthiazole isomers

• Ship in amber glass bottles to prevent light-induced degradation, with COA included in shipment