2-Mercaptothiazoline from Canada
2-Mercaptothiazoline (2-thiazoline-2-thiol) features an unfused thiazole ring with a thiol substituent, used in rubber vulcanization and photography. Falls under HTS 2934.10.90.00 as an 'other' thiazole compound per Chapter 29 definitions for organo-sulfur heterocycles not covered by heading 2930.
Duty Rate — Canada → United States
100%
Rate breakdown
9903.04.6093.5%Pharmaceuticals Annex IV: patented pharma articles — 100% 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)
Import Tips
• Classify as UN2785 organosulfur compound for DOT hazmat shipping compliance
• Provide vulcanization accelerator test data if declaring industrial chemical use
• Include stabilizer composition if product contains anti-oxidants exceeding Chapter 29 impurity limits