2-Acetylbenzo(b)thiophene Technical Grade from China
Technical grade 2-Acetylbenzo(b)thiophene (95-98% purity) matches the specific chemical explicitly named in HTS 2934.99.03.00 as an aromatic heterocyclic compound. Used in scale-up pharmaceutical synthesis, it qualifies under Chapter 29 for chemically defined organic compounds with permitted impurities. The fused thiophene-benzene structure with acetyl functionality defines its classification.
Duty Rate — China → United States
12.5%
Rate breakdown
9903.05.3112.5%Section 301 (forced labor) — additional 12.5% ad valorem on products of China
Import Tips
• Certificate of Analysis showing 95-98% purity maintains specific HTS 2934.99.03.00 classification vs general grade
• Batch-specific documentation required as technical grade variations affect duty treatment
• Ensure no added stabilizers beyond Chapter 29 note (f) allowances to prevent reclassification