2-Acetylbenzo(b)thiophene Technical Grade from Japan
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 — Japan → United States
27.5%
Rate breakdown
9903.04.6215%Patented pharmaceutical articles that are the product of Japan, of a European Union member country, of South Korea, of Switzerland, or of Liechtenstein as provided for in subdivisions (c) and (f) of U.S. note 40 to this subchapter
9903.05.4912.5%Except for products described in headings 9903.05.85–9903.05.92, articles the product of Japan, with an ad valorem (or ad valorem equivalent) rate of duty under column 1 less than 12.5 percent, as provided for in U.S. note 52 to this subchapter
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