2-Acetylbenzo(b)thiophene Technical Grade
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.
Import Duty Rates by Country of Origin
Alternative Classifications
This product could be classified differently depending on its characteristics or intended use.
If mixture with solvents >10%
Chemical mixtures/preparations in Chapter 38 if solvent content exceeds Chapter 29 solution limits
If for polymerized forms
Oxygen heterocycles with different ring structures classified separately per Chapter 29 note exclusions
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Import Tips & Compliance
• 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
Related Products under HTS 2934.99.03.00
2-Acetylbenzo(b)thiophene
2-Acetylbenzo(b)thiophene is a specific aromatic heterocyclic compound featuring a thiophene ring fused to a benzene ring with an acetyl group at the 2-position. It falls under HTS 2934.99.03.00 as one of the explicitly named 'other heterocyclic compounds' in the aromatic category of Chapter 29. This chemically defined organic compound is used as an intermediate in pharmaceutical and agrochemical synthesis.
3-Methylene-7-(2-Phenoxyacetamido)-Cephan-4-Carboxylic Acid, p-Nitrobenzyl Ester, 1-Oxide
This complex beta-lactam derivative is a specific cephalosporin intermediate with a dihydrothiazine ring, explicitly named in HTS 2934.99.03.00 as an aromatic/modified aromatic heterocyclic compound. The p-nitrobenzyl ester protects the carboxylic acid during synthesis of semi-synthetic antibiotics. It qualifies under Chapter 29 for chemically defined heterocyclic compounds used in pharmaceutical manufacturing.
Naphth[1,2-d]-[1,2,3]-Oxadiazole-5-Sulfonic Acid
Naphth[1,2-d]-[1,2,3]-oxadiazole-5-sulfonic acid is a fused heterocyclic compound explicitly listed in HTS 2934.99.03.00, featuring an oxadiazole ring fused to naphthalene with a sulfonic acid substituent. This aromatic heterocyclic compound serves as a dye intermediate and reagent in organic synthesis. Chapter 29 classification applies to its chemically defined heterocyclic structure.
Naphth[1,2-d]-[1,2,3]-Oxadiazole-5-Sulfonic Acid Sodium Salt
The sodium salt of Naphth[1,2-d]-[1,2,3]-oxadiazole-5-sulfonic acid, explicitly covered in HTS 2934.99.03.00, maintains the aromatic heterocyclic classification of Chapter 29. This water-soluble form is preferred for dye manufacturing processes. Salts of organic compounds remain classified with the parent acid per Chapter 29 note 3(C)(1).