2-Mercaptothiazoline from Japan
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).
Duty Rate — Japan → United States
12.5%
Rate breakdown
9903.05.4912.5%Section 301 (forced labor) — Japan (col1 rate < 12.5 percent): MFN < 12.5% → total duty capped at 12.5%
Import Tips
• Technical data sheet proving thiazole ring integrity required for classification
• Declare end-use as chemical intermediate, not rubber accelerator mixture
• Purity >98% certification prevents prepared mixture classification under 3824